A weekend getaway leads to a deadly game of deceit between two cunning sisters-in-law in this British psychological thriller. Though Lucy and Tim have been married for years, she has never gotten along with his sister. So when they plan a weekend in the country, they certainly don't expect Mary to show up. But it's Mary who's shocked when she arrives to find Tim missing. His belongings are gone, there's a bloodstain on the floor, and Lucy's story doesn't add up. Lucy insists that he left her, but Mary suspects foul play. When the police are called, each woman tells her own story--but Detective Reavley doesn't trust either of them. Accusations of affairs and violence only add to the tension, but soon explosive secrets come to light that no one could have expected.