In modern times where gods have been reduced to myths and legends, Jumang, who was once a weak god in charge of "contracts" and "faith", lost all his divine power and woke up in the blood of a human boy, Lu Ren, after sleeping for a thousand years. He found that he had become a "spirit behind" in the young man's body and had to rely on the young man's meager "faith" (the power of trust and commitment) to survive. In order to regain his strength and return to the throne of God, Ju Mang had to guide Lu Ren to fulfill the ancient duties of the "God of Contract" in the modern city, solve supernatural events caused by the betrayal of people's hearts, and deal with the evil god who coveted Lu Ren's body and the "God Killer" organization that hunted the remaining gods.
