Lu Xiao, the brilliant and composed captain of the Haigang Police, has built a reputation for cracking even the most complex cases. But when a mysterious “Water Ghost” killer and a floating corpse case leave him baffled, he finds an unexpected ally in his new roommate, Fang Yitong. Together, they form an unlikely partnership to track down the elusive murderer.

Gao Feng, a retired tycoon disguised as a delivery man, is hired by CEO Su Qingyan to be her fake husband, unaware he’s the real boss she wants to impersonate. As they enter a contract marriage, their hidden identities and growing feelings complicate everything.

Yan Yiyi, the heroine, accidentally enters the novel she wrote and tries her best to become a "nail house" in the cold palace to return to reality, but makes the emperor Qin Yu, who is sexually continent, very interested.

Detective Su Lingyu and audio-visual lab director Jiang Cheng join forces to solve a string of shocking crimes, from a tortured corpse and missing gold to a series of murders. As they dig deeper, they uncover a sprawling criminal network and finally reveal the truth behind Jiang Cheng’s parents’ mysterious deaths.