Moonlight Sister Returns

Moonlight Sister Returns Plot:

Su Yue, a piano prodigy who mysteriously vanished a decade ago, reappears in her hometown on a stormy night. The bookstore owner Cheng Mo, who has secretly loved her for years, notices her strange behavior: she wears an unfamiliar wedding ring but refuses to speak of the past, and plays the same unfinished melody every night in an abandoned piano room. When the sheet music bears the word 'killer' and bizarre deaths begin plaguing the town, Cheng must uncover the truth behind Su's disappearance before the moonlight sonata claims another victim.