Katie Donato and Dean Manion are total opposites. She's straight, he's gay. She's a serial monogamist, he's never been into commitment. But they both love sex and a challenge. So when Katie tells Dean she thinks she could pleasure him better than he could ever satisfy her, he dares her to prove it - by sleeping together. Soon Katie and Dean are taking their friendship to places they never imagined. But what about the guys they're dating?