Detective Markson arrived precisely at the ancient, gloomy estate's entrance gate. Heavy, oppressive clouds loomed ominously, casting eerie shadows upon arrival. A chilling, mournful wind howled, whispering secrets of impending revelations. Gravely, he noted the mansion's eerie silence, speaking volumes of tragedy. Distantly, an owl's hoot punctuated the night, heightening suspense further. In the foyer, a shattered vase hinted at recent, frantic struggles. Barely visible, a dark, ominous stain marred the pristine, white carpet. Suddenly, an old grandfather clock chimed, echoing eerily through corridors. Unseen, the murderer lurked, observing from the darkness, undetected.