At the end of summer vacation, the peaceful life of a group of high school students was suddenly disrupted: someone who called himself Admin added them to a strange group and forced them to start a "death game" - before they eliminated the unidentified "target person", if they did not reply to the classmates' messages, they would be shot in the head and die immediately! The classmates in the class died unexpectedly, causing panic among everyone. He Xixian, who was gentle and content with the ordinary, began to wrestle with Admin to protect his cherished friends; Yang Yueying, who hoped to save the whole class, was willing to take risks to expose the true face of Admin; Shi Xiaoyang, who had extreme ideas, tried his best to find the "target person" and get rid of him as soon as possible, sacrificing the minority to save the majority. The three of them acted and thought hard according to their own beliefs to save their classmates. Under the pressure of death, everyone in the class gradually revealed their twisted nature: Ke Zhiheng began to use the rules of the game to kill classmates in order to win; some people brutally killed their classmates for revenge; some people used important people around them as pawns in order to survive. The high school stage, which was originally full of youth and sunshine, instantly turned into a Shura field of blood and betrayal...