"Defiant Obsession" sees the arrogant older sister falling back into the arms of her cunning ex-husband.

Five years ago, Xia Liangliang thought Pei Jin was the young man who had made a vow of "no separation, no forgetting" with her, so they hastily got married. One second after receiving their marriage certificate, the truth was ruthlessly revealed by him: he was not the one she thought he was. This marriage was just a pawn for him to seize the Pei family's assets. Five years later, she has detached herself from "the abnormal", returning from being a business spy to living an ordinary life. He has become a playboy in high society. When they meet again, this time Xia Liangliang is sure that she will no longer love him. But he starts to纠缠her and even says that he loves her. Is this another conspiracy of his? Does he want to use her again? The truth is gradually uncovered. How will this conspiracy-like love end? Go back to the past or seize the present?