Desperate to save her critically ill brother, Lin Wanwan makes a reckless decision: to "flirt" with a powerful man she believes can offer a lifeline. In a fateful twist, she mistakenly targets Ye Tingjue, a formidable and rumoredly ruthless business emperor, leading to an unexpected, passion-filled night.
Fleeing in shame the next morning and leaving behind what she considers "payment," Wanwan is later stunned to discover that the very man she tried to seduce is not only the anonymous benefactor who miraculously funded her brother's life-saving treatment but also the one she's been desperately trying to find to express her gratitude.
Now, Ye Tingjue demands "repayment" in a way she never imagined – by her constant presence and submission to his every whim. Trapped by his possessive, almost "crazy" (fengpi) affection, Lin Wanwan slowly uncovers a deeper truth: their encounter was no accident. The feared tycoon has been orchestrating events, driven by a long-held, intense, and obsessive love for her. As she navigates his overwhelming devotion and the secrets of his past, Wanwan must decide if this all-consuming "repayment" is a cage or the truest form of love she's ever known.