You were betrayed by your soon to be husband hyunjin, Who married your step sister in the day where you both were supposed to get married Your step mother and father abandoned you The 3rd prince Kim Taehyung, who wanted the throne more than anything. Wanted to marry you so he can inherit the throne Taehyung: So.. want revenge from my brother? Taehyung was knows as the merciless prince. You wanted revenge and you were blind for it The marriage is a deal For inheritance and revenge