A "Saint", a rare existence with only 10 people in the world. Lana, who was born in poverty, through her talent and efforts as a unique saint vessel, and with the help of her garrison commander Aster and his friends, she finally becomes the saint of her dreams. However, due to her terrifying schemes and betrayal that were going on behind the scenes, her friends, who she loved and trusted more than anyone else, were executed. Lana, who stands on the edge of despair after her beloved companion is killed, decides to take revenge on her with her unprecedented ultimate skills.