The grandfather clock struck midnight when the body was discovered. Lady Pemberton lay motionless at the foot of the stairs. Her emerald necklace was missing from around her pale throat. Inspector Walsh arrived at the manor through the pouring rain. Five guests had been staying at the estate that night. Each one claimed to be sleeping soundly in their rooms. The butler stood trembling, his white gloves stained with blood. A shattered wine glass lay scattered across the marble floor. Someone in this house was hiding a very dark secret. The inspector pulled out his notebook and began his work.