There is a law in the underworld. All the dead must go through seven trials within 49 days of their death - in the murder prison, lazy prison, deception prison, unjust prison, betrayal prison, violent prison, and Tianlun prison. Only the dead who have been declared innocent through seven trials have the opportunity to be reborn. Firefighter Jin Zihong died in a fire to save a girl. The hell messengers Jie Yuanmai and Dechun appeared in front of Jin Zihong. Although Jin Zihong could not believe his death, Dechun told him seriously that he was both a dead person and a nobleman. At the entrance to hell, Jin Zihong met another messenger Jiang Lin who was waiting for him at the Chujun Gate. He was in charge of the two messengers Jie Yuanmai and Dechun, and would also defend Zihong in the seven trials that Zihong was about to accept. It turned out that if King Yama allowed 49 dead people to be reborn within 1,000 years, the three messengers could also be reborn in the mortal world. They believe that the 48th dead person, the nobleman Jin Zihong who appeared in 19 years, can be reborn smoothly. However, in various hells, Jin Zihong's past appears one after another, and it turns out that this nobleman still has "secrets that cannot be told".