Liu Ziguang (played by William Chan), who had been missing for eight years, suddenly appeared in his hometown of Jiangbei City. He lost his memory but found that he had a physique and ability different from ordinary people. In an incident of rescuing a kidnapped child, he was targeted by policewoman Hu Rong (played by Ma Sichun) as a suspect. Jiangbei police tracked down the transnational case of the new drug "Angel". By chance, the passionate Liu Ziguang assisted Hu Rong and the police in finding Nie Wanfeng (played by Liu Yijun) and related drug lords one by one, but unexpectedly found that he was involved and had a deep connection with Nie Wanfeng. Hu Rong's biological father was killed while performing an undercover mission, which was also related to Liu Ziguang. What happened in the lost eight years that completely subverted Liu Ziguang's life? Liu Ziguang and Hu Rong, who fell in love with each other during their relationship, where will they go?