The grand ballroom sparkled brilliantly tonight. Lady Pemberton adjusted her diamond necklace. Guests mingled beneath golden crystal chandeliers. Classical music filled the air. Lord Pemberton raised his champagne. "Welcome to our anniversary celebration!" Applause echoed throughout the room. The orchestra resumed their waltz. Lady Pemberton excused herself quietly. She climbed the marble staircase. Her silk gown rustled softly. The second floor seemed empty. A scream pierced the night. Guests rushed toward the sound. Lady Pemberton lay motionless below. Her necklace glittered beside her. Detective Morrison arrived within minutes. He surveyed the crowded scene. "Nobody leaves until I'm finished."