Shen Zheng, born with the rare Sacred Pure Yang Emperor Venerable Physique, descends from the mountain on his master's orders to infiltrate Hell Island and carry out a top-secret mission. By chance, he saves Chu Jinyu, the president of the Shenglong Group. After returning to the city, he conceals his identity and becomes her personal bodyguard. Facing schemes by powerful business families, martial arts challenges, and relentless pressure from the Temple of War Gods, Shen Zheng repeatedly overcomes every crisis with his peerless medical skills and extraordinary martial arts. A black gold card shocks the crowd, one punch decides the winner in the ring, and he defeats a divine shield with his bare hands. To help Chu Jinyu protect the Shenglong Group founded by her mother, he rises to every challenge and turns the tide. One needle determines life and death; one punch subdues the realm!