The orphan Ella embarks on a journey of revenge and redemption. Framed by the White Tower Council, she has her identity stolen by her cousin and falls off a cliff, where she encounters Kane, a cursed black dragon. Bound by a blood pact, the two become each other's support. Together, they travel through an old mansion, the royal capital, and a sacred mountain, collecting three dragon seals and gradually uncovering a shocking conspiracy: the council has been sacrificing civilians, slaughtering dragons, and plotting the murder of Ella's mother. Along the way, they heal the rift between brothers and persuade Ella's misguided cousin to change sides. They tear apart the master-servant contract that imprisons souls, reject control and dependence, and vow to stand together as equals. The story delivers deeply satisfying revenge and a tender yet powerful love shaped by destiny.