The rain fell all night. Detective Harris arrived at dawn. Blood stained the white carpet. Someone had killed Margaret Stone. Her body lay face down. A knife was missing nearby. The butler discovered her first. He screamed and called police. No one heard anything strange. Every door was locked tight. Windows showed no forced entry. The killer knew this house. Harris studied the crime scene. Something felt wrong to him. This was no random murder. Five guests stayed last night. Each one had dark secrets. Each one had strong motives. The investigation would start now. Truth hides behind polite smiles.