Calvin asks Dad to check under the bed for monsters, which he does. Then, he asks to have the dresser checked. Dad refuses. Calvin is sure that's where the monsters will be hiding, and that they'll come out when Calvin goes to sleep. Calvin decides to be proactive by arming himself with a suction dart gun and giving Hobbes a horn. The plan is to irritate the monsters by honking the horn, then shooting them. As they execute their plan, a monster comes in the door. Dad, with several suction darts sticking to him, asks Mom to come upstairs. Calvin is heard saying he was going to finish off the monster when he found his baseball bat.

Dad comes into the bedroom yelling that Calvin is making too much noise and is supposed to be asleep. Calvin replies he's hitting monsters under the bed. He's using a baseball bat. Dad shows Calvin he's mistaken by pulling Hobbes out from under the bed. Calvin says it's a good thing he occasionally missed with the bat. Hobbes agrees and asks to see the bat for a minute.

Calvin asks how many monsters there are under his bed. Only one replies. Calvin and Hobbes decide they outnumber the monster and can get him with a baseball bat. As they grab the bat, the voice under the bed tells the others to quit shoving. Calvin and Hobbes yell for Mom as the monster mutters thanks to Maurice, for ruining things.

Calvin, with bat on shoulder, throws a baseball into the air. He takes a big swing at it and hits the ball. SMASH! Glass shatters. Calvin happily notes that it was only his first try.

Calvin and Hobbes, lying in their sleeping bags in their tent, wish each other a good night. As we look at the tent in the moonlight, one of them asks if the other believes in ghosts. We then see both of them, wide-eyed and teeth clenched, with a baseball bat awaiting the daylight.

Calvin and Hobbes are playing baseball. Calvin hits the ball and runs. They throw the ball back and forth a few times as Calvin runs. Calvin tells Hobbes that was a nice double play. He asks who's out. Hobbes tells him it depends if he's on Hobbes' team or if Hobbes is on Calvin's team.

Hobbes hits the ball, and Calvin chases him to tag him out. Hobbes runs off the basepath. He keeps running through the woods. Calvin chases him saying he can't run anywhere he wants. Calvin continues to chase Hobbes and yells that he'd have been out if they had a first baseman. Hobbes replies that they don't and sticks his tongue out at Calvin. Finally, Calvin catches Hobbes and tackles him in a big cloud of dust. Hobbes gets up and says he's still up to bat. He says two-man baseball is a real sport. Calvin says it's a real sport for idiots. He says the next time he'll tag Hobbes out with a bat instead of the ball.

Calvin and Hobbes are playing baseball. Calvin scores. Hobbes accuses him of not touching all the bases. Calvin says that he did. Hobbes states Calvin didn't touch seventh base. Calvin points out that he did touch the water barrel after he touched the front porch. Hobbes clarifies that the barrel is twelfth base. Calvin thought the garage door was twelfth base. Hobbes informs him the garage door is twenty-third base. He accuses Calvin of touching all the bases out of order. Plus, he didn't touch the secret base. Calvin asks what that is. Hobbes won't tell him, because it's a secret. Calvin can't believe this moronic sport is our national pastime. Hobbes tags him out and tells Calvin to give him a dollar.

Calvin asks if the bee is still on him or not. Hobbes isn't telling him, since Calvin called him a hairball. Calvin apologizes for calling Hobbes a hairball. He asks if there is a bee. Hobbes tells him no. Calvin moves and OWW! He gets stung. Hobbes tells him that today is opposite day. So Hobbes' no meant yes, there was a bee. Hobbes is in a tree at night. Calvin, armed with a baseball bat, is standing at the bottom of the tree. Hobbes reminds him that opposite day is over at midnight.

Calvin is walking down the sidewalk with a baseball bat in his hand. On he walks, until he comes to a baseball lying on the grass. He picks it up and starts walking back. He hands the ball to Hobbes. Calvin tells him either they have to get a catcher, or Hobbes has to improve his pitching.

Calvin and Hobbes are playing baseball. Hobbes pops the ball straight up. Calvin comes in for the catch. He tells Hobbes this is an easy out. Hobbes just stands there. Calvin asks if he isn't going to run. He doesn't blame Hobbes because he's as good as out. Calvin has his glove ready to make the catch. Hobbes sticks the bat out and taps it away before the ball can fall into Calvin's glove. Calvin complains that Hobbes can't do that. Hobbes takes off running. He claims that's two hits on one pitch, so the run will count double.

Calvin and Hobbes are playing baseball. Calvin gets a single, so he has a ghost runner on first while he goes back to bat. His earlier ghost base runners advance. Hobbes calls them out. He says his ghost outfielder tagged Calvin's ghost runner and threw to the ghost second baseman. Hobbes says Calvin has two outs. Calvin angrily says his ghost runner from first base stole home, and he has another run. Hobbes says his ghost outfielders ran in and beat the tobacco juice out of Calvin's ghost runner. Calvin declares the ghost umpire suspended Hobbes' ghosts for eternity. Hobbes flips his glove off saying if his ghosts don't play, he doesn't play. Calvin declares a forfeit. Hobbes loses. Hobbes says the ghost crowd supports him. He says they're "boo"ing Calvin. Calvin sometime wishes he lived in a neighborhood with more kids.

Calvin has a bat on his shoulder and flips a baseball into the air. He swings and misses, as the ball falls to the ground. Calvin storms off dragging his bat on the ground behind him. He comes back with a golf club and prepares to hit the ball lying on the ground.

Calvin tells Hobbes he wishes snow was dry so you didn't get all cold and wet when you play in it. Then, he mentions that you couldn't make snowballs, which is bad. He then wishes it snowed in summer. But that would make it hard to run when you play baseball. As he and Hobbes walk away, he decides things are okay as they are. Hobbes is glad he approves.

Hobbes pitches the baseball to Calvin. It sails over his head, but Hobbes calls him out. Calvin protests. They get in each other's face and kick dirt on each other. They fight until they're exhausted. Calvin decides to try something else. He gets a step ladder, stands on it with his bat, and gets ready for the pitch.

Hobbes asks if Calvin has tested his duplicator yet. Calvin is ready to. Hobbes asks what they should duplicate first. Calvin volunteers himself. He says Mom wants him to clean his room, so he can duplicate himself and let the duplicate do the work. Hobbes says he can picture the looks on his parents' faces when they find out they've suddenly had twins. Calvin thinks he can make a whole baseball team this summer.

Susie comes over and asks if Calvin signed up to play baseball at recess. She says he must be the only one who didn't. The others are playing in the back fields. Calvin is the only boy on a playground full of girls. Susie says it looks that way. She asks if Calvin wants to teeter-totter with her. Calvin, shocked, says he's in Cootie Central and hasn't had his shots. Susie tells him stupidity produces antibodies. Calvin pulls his shirt over his mouth asking for an air filter.

Calvin is on the teeter-totter with Susie. She asks why he didn't sign up to play baseball. Calvin says he'd just rather run around. He says he hates the rules and organization and teams and ranks in sports. He says someone is always telling you where to be, what to do, and when to do it. He figures when he wants that, he'll join the Army and at least get paid.

Moe hassles Calvin about being a sissy for not signing up for baseball. Moe says Calvin would rather play with dolls on the playground. Calvin says he wasn't playing with dolls. Moe wants to see Calvin's Barbie doll. Calvin says he's not a wimp and was on his way to the office to sign up for baseball right now. Standing outside the office door, Calvin wonders why, if he's not a wimp, he's taking the path of least resistance.

Calvin tells Hobbes he signed up to play baseball at recess, even though he doesn't like it that much. Calvin likes playing with Hobbes, because they get to do everything. Hobbes admits he likes the part when they argue over the rules. Calvin figures it will be boring playing the game the way it's supposed to be played. Hobbes asks if Calvin even knows the right way to play. Calvin asks what happens if they make him a halfback. He wonders if he can tackle the shortstop or not.

Dad asks what story Calvin wants tonight. He wants a story about Hobbes and him. Dad starts making up a story about them getting up at the crack of dawn, making a huge ruckus, running up and sliding down the stairs. Calvin adds about the Big Bad Dad yelling at them and saying he'd mail them to Pluto third class if they didn't knock it off. Dad continues that Calvin went to rot out his innards with chocolate cereal and rot his brain watching cartoons. Calvin doesn't want editorials. Dad continues that Calvin and Hobbes went outside, and it was nice and quiet in the house for a while. He tells Calvin good night. Calvin complains that's not the end. Dad gives Calvin a kiss and says he's right. That isn't the end of the story. The story doesn't have an end. He and Hobbes will write more of it tomorrow and every day after. But for now, it's time to sleep. Calvin says that was a good story. Calvin and Hobbes wish each other a good night.

Dad offers to help Calvin practice baseball before dinner. Calvin goes out to get ready to field a ground ball. He complains that he should just move. Dad gets ready to hit the ball and tells Calvin not to wait on the ball. He needs to run up to the ball. Dad leans over Calvin, lying on the ground. Dad says the ball sometimes bounces up like that, and he has to be ready for that. Calvin, speaking through a clogged nose, tells Dad thanks for the tip. He tells Dad to find his nose and put it on ice so they can sew it back on.

Mom asks why they're coming back inside. Dad tells her a ground ball bounced up and hit Calvin in the nose. Calvin, still talking through a clogged nose, says his own Dad tried to kill him. His nose is bleeding. Mom tells him to hold his head back and use some tissues. Calvin says he's not playing baseball again. Dad says they can forget about having a millionaire baseball player supporting them in their old age. Calvin holds the tissues to his nose saying all his character is dripping out his nose.

Susie notices Calvin has a baseball glove. She asks if he signed up for recess baseball. Calvin tells her she's lucky girls don't have to put up with that nonsense. He says if a girl doesn't want to play sports, that's fine. If a guy doesn't want to chase some stupid ball, he's called a wimp. He says girls have it easy. Susie replies boys aren't expected to live their lives twenty pounds underweight.

In the tall grass, Calvin complains that baseball is the most boring game in the world. He's been standing out there all this time, and not a single ball has come out to him. Then, he figures that's alright, because he doesn't know which base to throw it to. Calvin notices the teams exchanging positions. The guys at bat are now out in the field. Calvin is sure someone would tell him if he was supposed to be doing something different.

Up in the tree branch, Calvin tells Hobbes he doesn't understand. When he didn't play, the other kids teased him. When he did play, the other kids teased him. Then the coach called him a quitter when he stopped playing. Calvin says unless you're a star, you can't please anyone. Hobbes asks why he doesn't just please himself. Calvin replies that Mom won't let him move to Madagascar.

Calvin and Hobbes are tumbling, drawing pictures, chasing a frog, in their treehouse, playing baseball, reading comic books, swinging, playing treasure hunt, and playing in the sandbox. Mom asks Calvin to empty a bag into the garage trash can. Calvin complains some vacation this summer is.

Calvin and Hobbes are playing baseball. Calvin hits it and runs the bases. Hobbes casually retrieves the ball as Calvin passes eleventh base. Hobbes walks with the ball. Calvin's going for home after touching twenty-fifth base. Hobbes tags Calvin out. Calvin, exhausted, thinks they need to change the rules.

Calvin has a bat and tosses a baseball into the air. As it falls, he swings and misses. He walks off. He returns with a beachball.

SMASH! Mom runs into the other room to see Calvin with a baseball bat. The chair is knocked over, and the lamp is broken. Calvin says he's a tricky devil, but he'll get him sooner or later. Mom throws Calvin outside. Sitting against a tree, Calvin tells Hobbes apparently he rates just below bugs with Mom. Hobbes says that she complains Calvin doesn't help around the house.

Calvin gets out of bed and gets dressed. Suddenly, a wind starts blowing his clothes off, rolls him back into bed, and covers him up. Mom comes in complaining he hasn't gotten up. Calvin tries to explain.

Calvin says baseball is an intelligent sport. He says it may seem slow, but that's because it's a thinking man's game. There's a lot of strategy to consider. Hobbes says "especially the way we play". Calvin says the first person to discover 12th base gets a ghost point and one free "get out of jail" pass.

Calvin tosses a baseball into the air, but misses his swing of the bat. He asks Dad if you can make a living playing silly games. Dad tells him you can be among the most overpaid people on the planet. Calvin sighs as he tries to hit the ball again.

Calvin catches a baseball. It goes right through him. He looks at the ball behind him and the hole in him. Hobbes asks how he could miss the ball. Calvin says he threw it too hard.

Calvin looks back and off they go, down the hill on the toboggan. Through the trees, snow flying around, just missing a tree. Blackness, with pained sounds follows. Upside down in the air, followed by blackness and more sounds of pain. In the tree branches, followed by sounds of pain and blackness. Calvin is upside down in the snow. He says that was the best ride ever. Hobbes, also in the snow, says he kept closing his eyes. He suggests they do it again.

Calvin looks at a baseball and says he's not scared. He throws the ball into the air. As it comes down, it shows teeth and chases Calvin away.

Calvin has a baseball glove and calls for the ball. A train comes toward Calvin. Lying on his back with the baseball next to him, Calvin tells Hobbes they'll work on his underhand pitches. Hobbes says if Calvin keeps running like that, he won't catch any fouls.

Calvin tosses a baseball into the air so he can hit it. He swings and hits the ball. It is stuck on his bat, chewing it. Calvin hides up in a tree. Dad asks what he's scared of. The ball isn't going to bite him. Calvin asks how he knows.

Calvin warily approaches the baseball with a bat. He taps the ball with the bat. The ball bites the end of the bat, and Calvin runs off. Later, Dad sees the ball and bat on the ground. He asks how often he's told Calvin not to leave his stuff in the yard.