Heeran Kang had one goal: vengeance. She was murdered in her first life and is abused in the next by her stepmother, but meeting her gentle nanny puts Heeran's revenge on hold...until her stepmother murders her nanny. Guided by insight from her first life, she makes alliances and moves to the Prison of Abyss. There, she is shown unexpected kindness. Will she fulfill her vengeance, or can she honor her nanny another way, and live a good life?

The best in the world, excellent martial arts, overflowing money and pleasure—the centre of the magical world, Black Astronomy. Kang Hee-ran, the granddaughter of the owner of Heukcheonmun, lives a life that has nothing to lack and nothing to be envied of, but dies at the hands of her stepmother. And for some reason, Heeran reverted to her younger self! In the life that started again, she goes down quietly and kindly with her warm nanny. The first step of revenge begins with making the third Confucius, Kang Lun, the king of the underworld who will soon rule Black Astronomy, into a man of Heiran...!! I was trying to live... Heeran's stepmother didn't like the way he looked and started to kill all of Heeran's people. And Heeran went to the bottom of the Dark Astronomical Gate to the realm of the deep hell for revenge.