The storm raged outside tonight. Detective Sarah Chen received calls. Another victim was found dead. The mansion stood eerily silent. Rain pelted the tall windows. She parked near the entrance. Lightning illuminated the dark scene. The butler opened heavy doors. His face showed obvious fear. Blood stained the marble floor. The victim lay completely still. A knife protruded from back. Guests huddled in the parlor. Everyone looked pale and shaken. The killer was among them.