Jack and the Cuckoo-Clock Heart

In a world where love and death are inextricably linked, a young boy's heart beats to a different rhythm. Jack, born on the coldest day in history, is given a mechanical replacement heart that runs on the whims of a cuckoo clock, forcing him to abide by three rules: never touch its hands, master his anger, and never fall in love. But when he meets Acacia, his artificial heart beats faster, threatening the delicate balance of his existence.