Retired mercenary "Lone Wolf" Fan Xiao was once a feared strongman in the mercenary world. In order to protect his sister Fan Yao who was suffering from leukemia, he became an anonymous car repairman in the suburbs of Jiangcheng. He only wanted to save money to treat his sister's disease in a low profile. An unexpected phone call on a rainy night led him to make a deal with Shen Zhiwei, the daughter of the Shen Group - with a one-year marriage, he would help her break away from the family marriage in exchange for 10 million in surgery fees, and a flash marriage was concluded in which each got what he needed.
After getting married, Fan Xiao lived in the Shen family courtyard. On the surface, he looked like a down-and-out car repairman, but in reality he was hiding a sharp edge. Shen Zhiwei was not interested in this transactional marriage at first, but she caught glimpses of his extraordinary qualities in accidents: subduing knife-wielding gangsters with bare hands at an abandoned dock, his calmness and tenacity in the face of family troubles, and his determination to protect her at the risk of exposing his strength. And Fan Xiao was gradually moved by Shen Zhiwei's kindness and stubbornness. From the initial non-interference, he gradually developed a protective feeling.
However, under the calm, there are dangers. Fan Xiao's former traitor, the "White Fox" under the pseudonym Gu Chengli, came with a blood feud and transformed into a philanthropist in Jiangcheng. He secretly colluded with Shen Zhiwei's second uncle Shen Zhihong in order to annex the Shen Group, while revealing Fan Xiao's true identity and killing him. Fan Xiao's identity as a lone wolf was exposed, attracting international headhunters and arrests. The Shen Group was also deeply involved in crises such as tax audits and a plummeting stock price...
