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 . . .