Five years ago, Lu Chen, the top commander of the anti-terrorism special forces (codename Longyuan), was betrayed by comrade Xu Mingxuan during a mission, resulting in the death of all 23 brothers. Faking his death and going undercover, Lu Chen disguised himself as a delivery driver to get close to Jiang Wan, the president of Wanzhao Group, signing a three-month fake marriage contract with her while secretly investigating Shadow Alliance—a mysterious organization manipulating the business world and the underground. As the investigation deepened, Lu Chen discovered that the car accident of Jiang Wan's parents twenty years ago, the core secret of Shadow Alliance, the Key of Dark Night, and Xu Mingxuan's true identity all pointed to a shocking conspiracy. And Jiang Wan's true identity is precisely the key to unlocking it all.