Timmy grows jealous of Dimmsdale's teen-singing sensation, Chip Skylark, for holding a concert on his birthday. Out of anger, Timmy plans to hold him hostage at his house; surprisingly, Vicky falls in love with Chip.

After Timmy wishes himself toy-sized to spend time with his old Crimson Chin action figure, Vicky's sister, Tootie, takes Cosmo and Wanda (disguised as dolls), and Timmy must go to Vicky and Tootie's house to find them.