As a boy, William Bellman commits one small cruel act that appears to have unforeseen and terrible consequences. The killing of a rook with his catapult is soon forgotten amidst the riot of boyhood games. And by the time he is grown, with a wife and children of his own, he seems indeed, to be a man blessed by fortune. Until tragedy strikes, and the stranger in black comes, and William Bellman starts to wonder if all his happiness is about to be eclipsed. Desperate to save the one precious thing he has left, he enters into a bargain.