Calvin walks by Mom. Mom comments on how nice and neat he looks. Calvin says he believes in the importance of good grooming. He says he better get in the tub if he wants to be in bed on time. Mom is stunned. She yells after him "Just what are you up to".

Mom looks in the bathroom. She heard Calvin splashing in the tub, but there's no water on the floor. His towel is hung to dry. The toothpaste cap is on. There's no mess. Mom sees Calvin is in bed. He asks her to look over his homework tonight, so he can correct any mistakes in the morning before school. He thanks her. Later, she reads from a Child Psychology book.

Calvin wishes Mom a good morning. She is shocked to see him up and dressed. She hadn't called him. Calvin says he likes to get up early so the morning isn't rushed. With the extra time, he can review his assignments and be better prepared for class. Mom says she's bracing herself for when the other shoe drops. Calvin tells her not to get up. He'll fix his own breakfast. He asks if they have any prunes.

Calvin says he's made his bed and put his breakfast dishes away. He's off to school. Mom wishes him a good day. Calvin tells her thanks. He says he'll study hard. A good education is invaluable. Mom stands by the door, puzzled. Under his bed, Calvin tells Hobbes this is working out great. Hobbes can't believe Mom thinks that's Calvin.

Calvin tells Hobbes he's perfected his duplicator this time. He says he added an ethicator. Now, instead of a complete duplicate of him, he's made a duplicate of just his good side. The good side duplicate does all the work, and Calvin gets all the credit. At school, the good Calvin raises his hand that he knows the answer. Miss Wormwood pats his head and says since he's gotten so many, he should let someone else try one.

Hobbes reminds Calvin the last time he made a duplicate of himself, the duplicates made duplicates. It was a mess. Calvin agrees, but he says with the ethicator, it can't happen this time. By only duplicating his good side, he's ensured this duplicate won't cause any trouble. He tells Hobbes there's nothing this duplicate likes better than making everyone's life easier. He lives for it. Hobbes thinks the ethicator must've done some deep digging to unearth him.

Calvin tells his duplicate that when he's done putting his toys away, he can get to work on Calvin's math assignment. Calvin says they get to do whatever they want, while goody-two-shoes does all the work. He doesn't even complain. The duplicate says "Virtue is its own reward". Reading his comic, Calvin says he doesn't complain, but his self-righteousness gets on his nerves.

The duplicate asks Susie if he can carry her books. She asks if he's going to throw them into a puddle. The duplicate says he wouldn't do that. Susie says he'd probably do something worse. She says he's not going to touch her books. The duplicate informs her that strictly speaking, he's not Calvin. He's the physical manifestation of Calvin's good side. Susie says if that was true, he'd be a lot smaller. The duplicate says he's heard that joke a lot.

The duplicate tells Calvin the nice girl down the street thinks Calvin is a total jerk. The duplicate says he offered to carry her books. Calvin can't believe it. The duplicate says she doesn't trust Calvin at all. Calvin grabs the duplicate and asks if anyone saw him. Calvin says they'll think it was him. Calvin asks if he wants to make it look like Calvin likes her. The duplicate says she seemed so upset, he took her some flowers he picked. Calvin is shocked.

Hobbes tells Calvin he hears he's pretty smooth with the ladies. Calvin tells him to knock it off. He says it's the duplicate. Calvin says he doesn't mind if the duplicate cleans his room and gets good grades. He draws the line at being nice to Susie. He asks Hobbes if the duplicate can't tell she's a girl. Hobbes informs him the duplicate has figured that out. He says he saw him cutting hearts out of construction paper. The duplicate writes "...and who could make my heart feel woozy? Only thou, my fair sweet Susie".

Calvin tells Hobbes not to tell him his duplicate is writing Susie mash notes. Hobbes calls Calvin a little charmer. Calvin runs off. As dictator-for-life of the Get Rid Of Slimy girlS club, his reputation is at stake. He looks in his room, but the duplicate isn't there. He says he must be on his way to Susie's house. Hobbes says he's probably getting smooches right now. Standing at Susie's door, the duplicate Calvin has handed Susie the note. Susie considers it sarcasm. She tells him if he comes to her house again, she'll clobber him.

Calvin goes to Susie's house. She says "You again". Calvin asks if he was there before. She asks if he's crazy. He was there two minutes ago. Calvin asks if he's still there. She says he's standing right there. Angrily, Calvin says anyone can see that. He wants to know if he's anywhere else. She slams the door. Walking off, Calvin asks who can fathom the feminine mind.

Calvin finds his duplicate. Calvin complains about the duplicate giving Susie a valentine. The duplicate says she wouldn't even accept it. He calls Calvin a jerk. Calvin calls the duplicate a namby-pamby goody-goody. The duplicate calls Calvin a self-centered, conniving brat. They fight. Hobbes asks how existential can you get.

The duplicate says he's going to fight Calvin. FFTT! He disappears. He had an evil thought. Hobbes calls it another casualty of applied metaphysics. Calvin says his ethicator machine must've had a built-in moral compromise spectral release phantasmatron. He says he's a genius.

Hobbes tells Calvin he's the only person he knows whose good side is prone to badness. Calvin says that's why he evaporated. He could only be perfectly good as an abstraction. In his human manifestation, he wanted to throttle Calvin. He spectralized just in time. Hobbes calls it fascinating. He reminds Calvin he'll have to do his homework himself. Calvin says since his good side is no longer a physical being, he finds him that much easier to ignore.