Shengke CEO Mu Zhixia holds the Tianshu algorithm and is driven to a desperate corner by the Gu family young master and her paternal uncle together. No one notices the air conditioner repairman Li Feng. Three years ago, he was the founder of the international top security organization Fengren, with the code name Feng. He originally wanted to hide his name and live an ordinary life, but because of her, he protected a person. Commercial covert warfare, serial assassinations, and capital encirclement, he protects her step by step to fight out of the encirclement.