When Uhyeon Baek logs into Reverse Planet, he expects to enter a VR game. Instead, he finds himself in a completely real world. It has been a long journey of suffering and experimentation that has transformed him into a mighty contract killer. Eventually, he manages to assassinate the man responsible for his agony. After he returns to his normal life, however, he realizes that he cannot escape the memories of his dead comrades.
As he tries to recover from the trauma, Baek returns to Reverse Planet only to realize that he is going to participate in a real dangerous game. He teams up with one of the hottest streamers in the industry, Soyul Kang, and becomes famous for his extraordinary skills.
