International mercenary Tan Xiaotian returns to China due to a special contract, becoming the personal bodyguard of Su Qingqian, president of the Su Group. By day he is a driver, by night an investigator, searching for the truth amidst a vortex where business wars and conspiracies intertwine. The mystery of his parents' deaths pulls in a transnational conspiracy, and seven women with different identities are all drawn into it—cold and glamorous president Su Qingqian signs a contract marriage, only to shed her arrogant mask late at night; campus belle Lin Yuxuan waits steadfastly, while his determination remains firm to clear his parents' name!