The body lay crumpled beneath the grand marble library staircase. Detective Sarah Chen arrived precisely at dawn, notebook in hand. Rain had washed away potential evidence from the front steps. The victim wore an expensive tuxedo, blood staining white fabric. Mrs. Hawthorne discovered him during her usual morning cleaning routine. She screamed loud enough to wake the entire sleeping household. Six guests had stayed overnight after the charity gala ended. Each one claimed innocence, each one had secrets to hide. The murder weapon, a silver letter opener, lay nearby. Sarah photographed the scene before carefully examining the victim's pockets. Inside she found a crumpled note with ten words written. "Meet me in the library at midnight. Come alone tonight." Sarah looked up at the nervous faces surrounding the scene. One of them was lying, one of them was guilty.