From her earliest days, Elliet sensed she was set apart. She possessed a strength and speed that surpassed all the children in her village. Because of this, her parents forbade her from revealing her extraordinary abilities to others. One day, while playing with her sister, Elliet unintentionally caused her harm. Consumed by anger and frustration, their mother confessed that Elliet was cursed and adopted. Heartbroken by this revelation, Elliet fled, embarking on a quest to uncover her true heritage. It was then that she discovered the world was far more expansive than she had ever imagined, filled with individuals who wielded power greater than her own. She was soon swept into the clandestine vandid society, a covert group of assassins comprising superhumans. Rising through their ranks like a dark horse, she quickly became the youngest and deadliest assassin in the world, earning the moniker "Dark Angel." Meanwhile, on the other side of the world, Sonya embarked on a mission to find her missing sister. Fate intervened when she crossed paths with a young boy destined to become the king of a formidable nation. After saving his life and those of his bodyguards, Sonya was conscripted into the army. Following numerous successful missions, she climbed the ranks, becoming one of the kingdom's most formidable officers. How would Sonya react upon discovering that the assassin responsible for the death of the only man she ever loved was her long-lost sister?