Lin Mo, the "living king of hell" in the business world, is a vicious-tongued boss outside, but at home he is a little puppy who clings to his special police wife Shen Qinghe. The two bonded over their childhood "hero saving a beauty" (actually a girl saving a boy), and they have been secretly married for three years. One is a decisive killer in a shopping mall, and the other is performing tasks on the front line. In private, they live a funny life of "the CEO exercises his abs to ask for praise, and the SWAT wife demolishes the house with her bare hands."
When the overseas criminal group "Poisonous Scorpion" targeted Lin Mo's transnational project, Shen Qinghe was ordered to lead a team to protect it 24 hours a day. The secret of the hidden marriage became the biggest hidden danger. The team members watched the "cold-faced King of Hell" turn into a coquettish person in front of Captain Shen, and misunderstandings occurred frequently: "Mr. Lin must have been caught by Captain Shen for something, right?" "Captain Shen beat and scolded him. Is this protection or 'domestic violence'?"
As the protection mission deepens, the "Poisonous Scorpion" conspiracy gradually emerges, and is closely related to the truth about Lin Mo's childhood bullying and the mystery of Shen Qinghe's father's sacrifice. The two of them went about their business of dismantling bombs, chasing murderers, and pretending to be a couple, while hiding the truth about being "married" while uncovering old cases. In the end, they turned from "secret lovers" into comrades fighting side by side, turning the crisis into a show of affection. After all, the best protection is to let the whole world know that he is hers.