Su Lingyun, a prodigy of his generation, becomes a trainee time cop. During a mission, he meets Pan Lili, and the two travel through the myriad realms to stop villains from disrupting the flow of time. Su Lingyun can rewind time once a day, for ten minutes at a time, a power that greatly aids him in his work. Together, they grow within the time police force, rising through the ranks from trainees. But when they uncover the astonishing truth about the Big Boss, Su Lingyun's faith crumbles. In the end, however, he will rebuild his convictions and continue fighting across the myriad realms.