When a group of wealthy English bohemians gathers for a weekend getaway at an estate, things quickly turn decadent. Among the privileged young Brits in attendance are the tense Quentin (Paul Bettany) and his wife, Cecilia (Alexandra Gilbreath), as well as the promiscuous Lucy (Katy Carmichael) and Giles (Charlie Condou), host of the whole affair. However, hedonism eventually gives way to paranoia when an enigmatic organization targets the revelers for death.