According to her guidance counselor, 15-year-old Payton Gritas needs a focus object --- an item to concentrate her emotions on. It's supposed to be something inanimate, but Payton decides to use the thing she stares at during class: Sean Griswold's head. They've been linked since third grade (Griswold-Gritas --- it's an alphabetical order thing), but she's never really known him.
The focus object is intended to help Payton deal with her father's newly diagnosed multiple sclerosis. And it's working. With the help of her boy-crazy best friend Jac, Payton starts stalking --- er, focusing on --- Sean Griswold…all of him! He's cute, he shares her "Seinfeld" obsession (nobody else gets it!) and he may have a secret or two of his own.