Lin Chen was once the all-powerful military king with the ability to sense danger. However, because of an old grudge, he came to Jiangcheng incognito and became a community security guard for the wealthy Su family. He was also the nominal son-in-law of Su Qingyue, the glamorous eldest daughter of the Su family. No one knew that this seemingly ordinary security guard had narrowly escaped death in a hail of bullets.
The Su family has an enviable pair of twin girls. The elder sister Su Qingyue is cold and distant, and is a well-known strong lady in the business world; the younger sister Su Qingyao is lively and smart, but always has an unknown vulnerability. Lin Chen's mission is to secretly protect the sisters, but as soon as he steps into the Su family, troubles begin one after another - Su Qingyue's business rival dies mysteriously, Su Qingyao is followed by a mysterious person, and all the clues vaguely point to an "accidental" bankruptcy case of the Su family ten years ago.
Hypocritical relatives of the Su family, jealous ladies of Su Qingyue, yandere-like mysterious stalkers, vengeful people who hold the truth about the past... People with ulterior motives appeared one after another. Lin Chen's superpower repeatedly warned of danger, but also plunged him into a deeper fog. Not only did he want to protect the safety of the twin sisters, but he also wanted to uncover the truth about the bankruptcy case ten years ago. However, as the investigation deepened, he discovered that even the twin sisters he guarded seemed to be hiding unknown secrets. In this suspenseful mystery surrounding the Su family, who is the murderer? Who is behind everything? As a son-in-law, Lin Chen fights for protection and the truth in the urban jungle with the strength and abilities of the King of Soldiers.
