Cheng Xiaoshi (played by Jiang Long) was taken care of by his neighbor Qiao Ling (played by Bu Guanjin) and his family because his parents disappeared when he was young. When he ran a photo studio, he met Lu Guang (played by Bi Wenjun). Cheng Xiaoshi and Lu Guang, who have very different personalities, have the special ability to cooperate and enter photos. After Qiao Ling, a reporter, learned of their abilities, he also joined the "Time Agent" commissioned team. The three of them embarked on a fantasy journey of helping others make up for their regrets, finding the truth, and completing their own growth. The play is adapted from the original animation of the same name "Time Agent".