The old mansion loomed ominously against the stormy sky, its windows dark and uninviting on this fateful October night. Detective Sarah Collins stepped out of her car, her trench coat billowing in the wind as she approached. She had been called to investigate a gruesome murder, one that promised to be unlike any she'd seen. The victim was rumored to be the reclusive millionaire who owned the estate, found dead in his study. As Sarah reached the front door, she noticed muddy footprints leading away from the scene of the crime. Lightning flashed, illuminating a shadowy figure watching from an upstairs window before quickly vanishing from sight again. Sarah's hand instinctively moved to her holstered gun as she knocked, her senses on high alert now. The door creaked open, revealing a pale-faced butler who ushered her inside with trembling hands and fearful eyes. The foyer was dimly lit, the air heavy with the scent of expensive perfume and something else. Sarah couldn't shake the feeling that she was being watched as she followed the butler upstairs.