Constance (Nikki Amuka-Bird) is a Nigerian refugee found on a small boat in the Chatham docks by a couple, Mark and Nicky, who take her in. A devout Christian, Constance cannot remember what has happened to her. At church a young man, Terry, falls for her. But the feelings are not mutual, as Constance is falling in love with Mark's boss, Alan (Andrew Lincoln). When Constance rejects Terry's physical advances, his violent revenge has tragic consequences for all involved.