An architect hears rumors of Cheng Xiaoshi and Lu Guang powers and seeks them out to change his regrets from the past during his last basketball game. However, Cheng Xiaoshi's actions could end up shifting the past and altering the future.
After the game, Cheng Xiaoshi continues the mission smoothly. After delivering the messages, Cheng soon realizes that this mission was directed toward an unspeakable memory- an Earthquake that is destined to kill Chen's friends and family.
Cheng comes to understand why altering the basketball game had no effect on the timeline, as they were doomed to die anyway. Cheng strikes Lu Guang in anger before crying into Lu's chest.
Cheng loses track of the kidnapper while trying to avoid changing the timeline by interacting with Qiao Ling. The duo eventually gain enough clues to save the child. An officer asks for the duo's help in another case and is rejected by Lu.
Xu Shanshan, a friend, wants to know what her love interest Dong Yi said to her as she blacked out. Cheng (as Xu) chases a possible serial killer, a false alarm. In the present, a phonecall to Xu is answered by a strange man's voice.
Lu Guang visits the police to help Xu, and sees Cheng inside a photo. Cheng gets into the killers trunk, and eventually realizes the woman being killed is Emma. Cheng exits the photo defeated and talks to Lu and Qiao.
Cheng prepares to enter a photo that may end with Xu's death. Simultaneously, Cheng stops the attacker in the past and Lu locks the attacker in the development room in the present. Cheng returns to the present inside the same room.
Cheng planned Xu's safety in return for a "hint". In the present, Cheng defeats the killer, Liu Min, who is arrested. Cheng tries to save Emma from suicide, but Emma is possessed and kills herself. Qiao is also possessed and stabs Lu.
In order to marry Ouyang, the daughter of the master of martial arts, Siwen commissioned the Time Photo Studio to help him crack the master's unique martial arts.
