Matt is just starting his freshman year of high school and though it doesn't feel like much has changed, a lot is about to change. After breaking up with his girlfriend Rebecca, Matt finds a mysterious love note in his locker signed by "that girl". Curious to know who the note is from, the only clue Matt has is the P.S. that claims the writer is a sophomore. Matt is then confronted by five girls who all claim to know who Matt's secret lover is but none of the girls are willing to spill. Aside from not giving Matt any hints, the girls are fond of playing with his head and giving him obstacles to overcome to find the identity of "that girl".