Due to a heated dispute over a man, Nelly becomes so consumed by desire that she plans to murder Celine solely to win Ron, Celine's boyfriend. After successfully carrying out the act, Nelly returns triumphantly to reunite with Ron, unknowingly orchestrating a chance encounter between Celine and Saint, the most dangerous individual alive. In an unexpected turn of events, Saint inadvertently saves Celine from certain death and brings her back to his home. Initially perceiving Celine as vulnerable and naive, Saint contemplates using her heart to replace the heart of his sickly sister. Upon regaining consciousness, Celine discovers Saint's ulterior motive and makes a daring escape. During her flight, Celine uncovers the truth about Nelly and Ron's marriage. Fueled by rage, she confronts Saint and proposes a deal. "Saint," she declares, "I'll give my heart to your sister on one condition: you must promise to protect me with unwavering loyalty. For I have a burning desire for revenge."
