To save her critically ill father, Elena striked a secret deal with billionaire Benjamin, became his on-call personal assistant and secret lover. For three years, she endured his control and humiliation, only to discover he has long been engaged. Torn between revenge and true love, Benjamin later uncovers that his brother Kevin is the real killer of their mother. After the truth emerges, the two endure life-or-death trials—kidnapping, car accidents, fake death, and more—finally foiling the conspiracy hatched by Kevin and his fiancée Melanie. Letting go of family hatred, they embrace each other honestly and welcome the hope of a new life.