Zhao Qiang works as a sorter at the Memory Management Bureau. His main job is to check whether clients' deleted memories violate any rules and then classify them. One day, while inspecting a memory at work, Zhao Qiang discovers a chip that appears to contain prohibited content. As he examines it, he finds that the chip's recorded contents are closely connected to the recent, widely discussed case of a celebrity's murder. The victim's company offers a five-million-yuan reward and calls on capable people to help investigate. Hoping to claim the reward and change his dismal circumstances, Zhao Qiang conceals the chip's violation and sets out to hunt down the killer.