Peng Zhendong (Kim Sung-joo) once had a very happy family, but a cruise ship explosion destroyed everything, and his wife Xie Jiaxin (Ruby Lin) also died in a car accident. Peng Zhendong became the only one who survived, living in sadness and pain. Ten years later, Peng Zhendong changed his appearance and hid his name, hoping to investigate the truth of the accident. By chance, Peng Zhendong obtained a camera with special functions that could take him back ten years ago. In the journey again and again, Peng Zhendong met a woman named Song Qiaoqiao (Xu Lu). Although the initial encounter was not good, as time went on, Peng Zhendong found that the lively and innocent Song Qiaoqiao gradually occupied his heart. The reversal of time made Peng Zhendong regain his feelings for his wife, and he began to hope that he could save his wife's life by reversing time.