Casey Duncan is a homicide detective with a secret: when she was in college, she killed a man. She was never caught, but he was the grandson of a mobster. Casey's best friend, Diana, is on the run from a violent ex-husband. Casey knows it's time for the two of them to disappear again. Diana has heard of a town that takes in people on the run who want to shed their old lives. You must apply to live in Rockton and if you're accepted, it means walking away entirely from your old life.