The heiress of a billionaire loses everything: her parents were murdered, both their company and property were taken by her aunt and cousin. What can she do but seek revenge? She starts by blackmailing Siwa Ratthanarith, the guy her cousin is in love with, about his father's indiscretions and evil deeds. Over time they fall in love. She starts to value his love as she learns to forgive. But will these changes be too late? (Source: Choi's_(MY) at MyDramaList) ~~ Adapted from the novel “Rahut Rissaya” (รหัสริษยา) by Chalalai (ชลาลัย).