Cory and Shawn pretend that they're in a band so that they can impress girls. This inspires Alan to connect with his former bandmates. But while this creates some problems for him, Cory and Shawn face a bigger dilemma: they are accidentally booked as the entertainment for the school dance.

Cory wins a girl's heart with a little politeness – but he better stay respectful, because she's Harley Keiner's kid sister, Theresa, also known as "T.K.", who never takes no for an answer.