After running away from his abusive parents' home, Damien managed to find a place in a school dormitory and made a career out of it, starting out as the CEO of a private company after college. But Damien had a six-year-old sister left behind, and although he felt guilty about leaving her behind, he moved on with his life.

Years later, while Damien was living his own life, an electronic request came from the police, his family had been imprisoned for drugs. He didn't care at all and didn't go. While he was having a night out with his girlfriend, the doorbell rang. Damien grumbled as he got out of bed, pulled on his trousers and opened the door. A familiar girl, around 15 years old, was standing in front of the door with a bag on her shoulder.