A high school senior unexpectedly receives a divorce revenge system twenty years ahead of schedule. At thirty-eight, plagued by a failed marriage and standing at life's crossroads, he yearns for his childhood sweetheart—a connection severed after their vows. Reconnecting with Xu Qianqian triggers a system reward of 300 RMB, but eighteen-year-old Jiang Nian faces an unsettling puzzle: which girl will become his future ex-wife? Trapped in perpetual adolescence and cursed with visions of divorce, Jiang Nian must navigate tasks designed to enact vengeance on the woman destined to betray him. Yet when he encounters his prophesied ex-wife in her youthful form, certainty crumbles into confusion. As his childhood sweetheart, future ex-wife, and future ex-girlfriend converge in their younger selves, Jiang Nian discovers that preventing heartbreak may require more than foresight—it demands impossible choices between destiny and desire.