The woman was sent to a maximum-security prison by her foster parents, who favored her stepsister due to the stepsister's manipulations. After three years, she planned to escape and seek revenge, but the prison's unique setup rendered her powerless. A man arrived at the prison looking for a replacement for his sister and rescued her after she was injured during an escape attempt. He took her to his estate, where she learned about his personality, prompting her to try to escape again. Almost caught, she found herself in an ambiguous situation with him.
