On a stormy night, set in the early 20th century, a group of members of London's high society are traveling home from a social event and their car gets stuck in the mud in the countryside. They seek refuge in a remote country house. There they are received by the mysterious Uriat and his taciturn mother. Uriat explains to the guests that his mother has the powers of a medium and can communicate with the dead. Some of the guests are amused and are persuaded to take part in a séance. But when the old woman begins to tell those present details from their own past, the mood quickly changes. It turns out that everyone present carries a dark secret with them and the group is entangled in a web of mutual deception, affairs (including lesbian affairs) and acts of violence. The hosts are also part of this network, as it finally turns out.