Zhang Shutong carries the weight of two tragedies bound to youth—a privileged heiress and a solitary shrine maiden hidden in mountain depths. Their fates are sealed eight years apart: one by unsolved murder, the other by inevitable death. Armed with a dangerous secret—the power to traverse time itself—Zhang Shutong attempts the impossible: rewriting their destinies. But salvation comes with an unforeseen cost. The women he desperately saved become entangled in bitter conflict. A snow-locked island holds darker secrets: a pristine lake concealing shadows, a decades-old serial killing that refuses to fade, and the shrine maiden's body growing inexplicably cold. On this winter refuge, a circle of young souls discovers that salvation and damnation exist closer than imagined—where nostalgia mingles with terror, where devotion tangles with romance, and where every choice echoes with consequence.