Lu Yue and Gu Beicheng become trapped in a time loop, with each cycle ending in death. They discover that the only way to escape is to uncover the true cause of the Gu family patriarch's death. After going through numerous cycles, they realize there may be multiple murderers and enlist the help of a forensic pathologist and a detective. In the final loop, they manage to find crucial evidence at the last moment and bring the culprits to justice, finally breaking the cycle. Lu Yue decides to divorce, but Gu Beicheng firmly declares his love for her. After overcoming numerous twists and turns, the two ultimately find their way back to each other.