Prosper Redding is an ordinary twelve-year-old boy. He has a twin sister, parents who founded a charitable foundation, and a whole bunch of rich relatives, and he himself is a talented artist. But he does not feel happy, because at school he is considered an outcast, despite the wealth and fame of the family, and even his sister laughs at him. However, Prosper could not even imagine that he would have to deal with a demon who spent three hundred years in captivity, and now at any moment he can break free and take revenge on all the Reddings for the sins of their ancestor. And the demon, who dreamed only of revenge, could not imagine that he would help one of the Reddings find his kidnapped sister...