Two bored rich kids plan and execute a perfect murder, then watch the police fall for a planted clue. They figure they've gotten away with it. What they don't figure right is Cassie Mayweather. Sandra Bullock plays Cassie Mayweather, a homicide decective confronting personal demons while following her instincts about the real killer in a Jane Doe murder case. The clues point one way-but the chain of evidence is too perfect.