The sleepy seaside town of Port Devine, on the Northern Ireland coast is shaken up by the mysterious arrival of English Detective Constable Leila Hussain. The residents want to know why she's come, but only Inspector Finn O'Hare knows the reason Leila's been transferred, and he's keeping it to himself. Together they focus on investigating crime with Port Devine's police department, and try to keep Leila's dangerous past from catching up with her.