Chu Qianfeng was once the richest man in Jiangcheng, but he was framed and thrown into prison. His family is plunged into crisis while he remains behind bars. However, when the drums of the Underworld King sound, prisoners and guards alike kneel in reverence. It turns out that Chu Qianfeng is none other than the legendary Underworld King! Within the prison, he displays astonishing strength and wisdom, punishing traitors and striking fear into his enemies. But his enemies' schemes are far from over, and they threaten to harm Chu Qianfeng's wife and daughter. Faced with one crisis after another, can Chu Qianfeng turn the tables from within the Heavenly Prison, protect his family, and reclaim his former glory? A thrilling journey of revenge is about to begin!