Run: 2026-05-20-01KS2600AQ6J4QM5555TW4EE76

The grandfather clock chimed midnight as the frozen rain lashed against the cracked window of the dusty, abandoned library. Detective Arthur Vance stepped over the shattered glass, his leather gloves smelling heavily of damp earth and stale smoke. A single spotlight shone directly upon the mahogany desk where the victim sat upright, wearing a scarlet velvet mask. No blood marked his white silk shirt, yet a silver letter opener protruded deeply from his silent, still chest. A pool of spilled ink crept slowly across the leather surface, dripping quietly onto the victim’s expensive Italian shoes. Arthur knelt to examine the fallen iron key that rested inches away from the dead man’s stiff, outstretched fingers. "The locked room puzzle strikes again," whispered the nervous young officer who stood shivering near the shadowed doorway entrance.