Hard Candy(2006)

A smart, charming teenage girl, Hayley probably shouldn't be going to a local coffee shop to meet Jeff, a 30-something fashion photographer she met on the Internet. But Hayley's ready to have fun, and soon she's mixing screwdrivers at Jeff's place and stripping for an impromptu photo shoot. It's Jeff's lucky night--until his vision blurs and he passes out. Turns out Hayley isn't as innocent as she looks after all. In fact, she has a lot on her mind. Like getting Jeff to confess to his penchant for teenage girls--and to what he did to Donna Mauer, the girl who disappeared from Jeff's favorite coffee shop. When Jeff awakens, he's tied to a chair. If he doesn't cooperate, Hayley has something to help him along--a little surgical procedure she picked up on the Internet. All she needs is an ice pack. And a knife.