Chen Feng, in order to avenge his sister who was killed by the powerful Zhang Haotian, signed a contract with a mysterious existence and became a "contractor" who can rewrite reality. His revenge plan triggered a series of chain reactions, and finally, after success, attracted a higher-level existence to maintain the order of reality - the "arbitrator", transforming him from an avenger to a guardian who is against the rules of the world to protect the innocent.