In a corner of a busy city, there is a small shop called "Time Photo Studio." While it looks normal from the outside, it is run by two men with extraordinary powers: Cheng Xiaoshi and Lu Guang. Using their combined abilities, they can enter the world of a photograph to fulfill their clients' requests.*

Cheng Xiaoshi can "dive" into the person who took the photo, possessing their body and memories, while Lu Guang tracks the events within the 12-hour window of the photo's capture and guides Cheng's actions. However, working with the past is a dangerous game. They operate under a strict rule: "Never change the past, and ignore the future." When a high-stakes request leads Cheng Xiaoshi to meddle with the fate of a young woman, they trigger a butterfly effect that uncovers a dark, overarching conspiracy and threatens the lives of everyone they know.