Mom tells Calvin she and Dad are going out tomorrow. He'll have a baby sitter. Calvin asks for it not to be Rosalyn. Mom informs him that she called eight people, and Rosalyn is the only one who will do it. Calvin wants her to call more. Mom says she's been calling for an hour already. She says Rosalyn is fine. Calvin says Rosalyn is a barracuda in a high school senior suit. Mom asks Calvin if he remembers Amy. She just laughed when Mom called her.

Calvin hears the doorbell. The baby sitter is here. Hobbes suggests hiding, but Calvin says they smell fear. Hobbes suggests going on the offensive. Calvin asks for paper and a pencil. Hobbes recognizes a blackmail attempt coming. Calvin tells him to get to the upstairs phone when she calls her boyfriend.

Mom leaves and says good-bye to Rosalyn. Rosalyn calls up the stairs to Calvin to see if he's up there. Two suction darts come flying down at Rosalyn. She charges up the stairs, rolling up her sleeves. She tells Calvin it's "Bedtime for Bonzo". Calvin complains that it's only six o'clock.

Calvin and Hobbes are lying in bed. Calvin can't believe they were put there, and it isn't even dark out. Calvin decides that while she can put them in bed, she can't make them sleep. He gives Hobbes a horn, he gets a tom-tom. Rosalyn looks in and reminds Calvin that sleeping in a bed is a privilege, and that the basement will be less comfy. Hobbes wonders what she meant by "the basement". Calvin quickly turns and says "Shhh!".

Mom calls Rosalyn to tell her they are going to be later than planned. Rosalyn tells her Calvin went to be early, and she's just holding down the fort. In the background, Calvin yells out. He wants to know if that's Mom. He wants to talk with her. He yells for her to come home before it's too late. Rosalyn tells Mom it's just the TV and to enjoy the play.

Mom and Dad come home. Mom asks if Rosalyn got Calvin to bed. She replies yes, but. Calvin yells down the stairs asking if that was Mom and Dad, did they get rid of the baby sitter, and thanking goodness they were home. Mom asks if he's been that way all night. Rosalyn says his voice gave out around 11:00, but yes. Calvin yells for them not to pay her anything. Mom tells Dad to give her a little bit extra. Dad wonders if five is enough. Rosalyn suggests eight, since college tuitions are up.