Retired special forces officer Zhong Xiaonan is assigned to protect Lin Zihao, the son of a renowned Chinese-American scientist, as he returns to China. With their groundbreaking research targeted by a powerful international syndicate, Lin Zihao becomes the focus of a dangerous kidnapping plot. Teaming up with Chinese-American cop Peter, Zhong Xiaonan faces a series of fierce confrontations with the criminal group, working to prevent their scheme and ensure Lin Zihao’s safe return home.