Gan Tianlei, Xiong Guoliang, and Yang Xiaolei were once the inseparable trio at the police academy. Gan Tianlei was disciplined for fighting and injuring someone while helping Yang Xiaolei out of trouble. After leaving the academy, he headed south to make a living, where Che Lizi, a young key member of the Caesar Group, took notice of him and brought him into the organization. Gan Tianlei met Shi Xiaohai, an undercover police officer known as Uncle Hai, who guided him. He became Tai Yongfeng's informant and repeatedly distinguished himself, eventually receiving special approval from the provincial police department to become an officer. During an operation to bring down the Caesar Group, Su Ling detonated a bomb, leaving Gan Tianlei in a coma. Eight years later, Gan Tianlei awoke in the hospital, but he had lost his memory.
