Disgraced attorney Nie Zhiyi offers a disowned heir, Zhai Shuangbai, a life-changing deal: infiltrate his family’s business empire as a spy and seduce his rival. Desperate for money to fund a lifesaving surgery, Zhai accepts, agreeing to the dark terms: go undercover, administer poison, manipulate with charm, and sever ties with a rival suitor. As deception turns into unexpected feelings, guilt and desire spiral out of control. Will this tangled web of betrayal and love consume them both?