The protagonist Chen Mo's mobile phone will automatically open an unknown program called "Death Live Room" at 00:00 every night, playing a blurry, short video from a first-person perspective - the content of the video is a death incident that he will witness with his own eyes the next day. He couldn't close it, couldn't record the screen, and couldn't prove the existence of this live broadcast room to outsiders. The only thing he can do is to find the places and people in the video within 24 hours and try to prevent the death from happening.
