There is nothing more dangerous than a desperate man

Bank clerk William Marble is facing financial ruin - until a visit from a wealthy young relative, a bottle of Cyanide and a shovel offer him an unexpected solution. But there is no such thing as the perfect murder. Gradually Marble becomes poisoned by guilt and fear, and his entire family corrupted. Sooner or later his deed will catch up with him, as events spiral out of control in the most unpredictable of ways...