The clock struck midnight as the mansion's grand hall echoed with the sound of a distant, haunting melody playing softly. Detective Harper arrived at the scene, his trench coat flapping in the cold wind, eyes scanning for any immediate clues. A shattered vase lay on the floor, its porcelain pieces glinting under the dim chandelier, hinting at a recent struggle. Lady Evelyn's lifeless body was sprawled on the Persian rug, her once vibrant eyes now staring blankly into the void. Guests whispered in hushed tones, their faces pale with shock, as the realization of the night's horror slowly sank in.