After ten years of being exploited by Duke Gerwehr for her healing powers, Agnes meets her death in a dungeon. When she wakes up, she finds herself in her uncle's house before she was sold to Duke Gerwehr in the slave market. Desperate for her past life not to repeat itself, she lets Duke Rodwick adopt her and starts her new life with a new name, Tuariche Rodwick. Will she be able to keep her healing powers secret in this notorious family of assassins and find true happiness and love in her new life? (Source: Webtoon Entertainment)