A group of friends living in London's Covent Garden are subjected to the whims of a dangerous prankster. At first, whilst disturbing, the tricks are funny. But as they continue they become more serious and violent, until finally someone lies dead.

As the remaining friends struggle to manage their grief and identify the culprit, suspicion soon falls close to home and secrets furtively kept hidden are brought to light. Alliances are formed, and the once-cosy group begins to turn on each other. Could one of them really be capable of murder?