In 1995, six university students moved into the house at 215 Caldwell Street. Months later, one of them was found dead on the sofa the morning after their end-of-year party. His death was ruled an accident by the police. The remaining five all knew it wasnât, and though they went on with their lives, the truth of what happened to their sixth housemate couldnât stay buried forever. Twenty years later, all five of them arriveâlured separately under various pretensesâat Wolfheather House, a crumbling, secluded mansion on the Scottish isle of Doon. Trapped inside with no way out and no signal to the outside world, the now forty-somethings fight each otherâand the unknown mastermind behind their gatheringâas they confront the role they played in their housemateâs death. They are given one choice: confess to their crimes or die.