A smart, charming teenage girl, Hayley (Ellen Page) probably shouldn't be going to a local coffee shop to meet Jeff (Patrick Wilson), a 30-something fashion photographer she met on the Internet. But before she knows it, she's mixing drinks at Jeff's place and stripping for an impromptu photo shoot. It's Jeff's lucky night. But Hayley isn't as innocent as she looks, and the night takes a sinister turn for the worse when she begins to exact her unique brand of revenge on Jeff for scandalous crimes she believes he has committed in the past.