Former special police sniper Zhong Xiaonan was hired by security company Gao Bin to protect the son of Chinese scientist Lin Heng, Lin Zihao, from returning to China. The scientific research achievements mastered by the Lin father and son have aroused the covetousness of overseas tycoons. They sent a killer group to try to kidnap Lin Zihao and steal core data, and even colluded with local police officials to launch a heavy siege on Zhong Xiaonan and Lin Zihao. In danger, Zhong Xiaonan teamed up with Chinese police officer Peter and resolutely decided to fight against evil forces to the end, and overthrow all "black evil".