Set over a long weekend in East Anglia, this is the chilling story of a rivalrous friendship. The scene is set for sunlit relaxation between old university friends. Two couples Ian and his wife Em and the golden couple, Ollie and Daisy resurrect a bet made twenty years before as dangerous tensions emerge. Each day becomes a series of challenges for higher and higher stakes, setting in train actions that will have irreversable and horrifying conseuences.