When her husband Harry walks out after just six months, a girls' weekend away with two friends seems like just what Sam needs. But they aren't even halfway to their destination when things start to go wrong: car trouble that just happens to leave them stranded in the town where Harry lives. And that's only the beginning. Because there are three things Sam doesn't yet know: One of her friends is lying about why they're there. One is lying about who she is. And one of them will never make it home . . .