Before rookie police officer Mu Tian can carry out his first mission to capture a drug lord, his wealthy future father-in-law tears him and his girlfriend apart. During the operation, the naive young man is knocked off a cliff and dies on the spot. By a twist of fate, he transmigrates into the body of a down-and-out young master in Republican-era China, only to be hunted down by an old enemy and kill him in self-defense. With no choice but to flee to Shanghai, he discovers that he is the long-lost son of Qiao Shikuan, a department-store tycoon who has been missing for twenty years. But he has no desire to inherit the family business. All he wants is to do what he loves: become a detective. In Shanghai, now an isolated island where countless forces vie for power, watch how he rises above the cutthroat competition and takes his life to new heights.