The narrative follows smart and sassy teen Zoey Miller, a computer geek who prefers science over romantic dalliances. One day, the school heartthrob, Zach, experiences an accident, and she helps him out. But this results in Zach getting amnesia. He mistakes Zoey Miller for Zoey Wallace, his new girlfriend. Zoey goes along with this mistaken identity situation to help Zach until the other Zoey arrives, and so does trouble.