Joo-young, a man in his mid-fifties who has lost his money, his home and his marriage, is standing at the edge of a cliff when a star-shaped pendant he was given decades ago reappears in his hand. Its glowing gems let him return to moments of his past for twelve hours at a time, and he soon learns that whatever he changes there carries over into the present. With only a few jumps left, every attempt to fix his ruined life sets off consequences he never saw coming.
