Chairman Kang trembles at his wife's affair with Min Chul, but remains silent about the reasons. He then arranges a marriage between Min Chul and Yoo Ri, the daughter of a conglomerate family, leading to an engagement. Min Chul meets Yoo Ri and awakens to true love. Driven by jealousy, Hee Ran transforms from a femme fatale into a cruel woman. However, Hee Ran, after discovering these weaknesses and unintentionally killing Hwang Dal and Ae Ra who threatened her, poisons Chairman Kang with a meticulously planned method from the start, and forces Min Chul to seize his fortune and flee abroad. Meanwhile, Min Chul finds evidence that Chairman Kang was his mother's murderer, but by then he has already fallen into Hee Ran's trap, finding himself in a self-destructive predicament. Finally, Hee Ran reaches the last moment to poison Chairman Kang, but he, having anticipated the situation, makes Hee Ran drink from the poisoned chalice as well, orchestrating a final communion party, which results in her downfall. However, just before dying, Hee Ran embraces Min Chul and unleashes a cruel euphoria as a victor of love. Cause and effect... Ultimately, a perfect crime could not be established.