Anyone can make a mistake, but when higher powers - Good and Evil - make a mistake, it has catastrophic consequences. Assuming that he is terminally ill, Lucifer decides to find himself a successor among people, the most harmful and evil boy in the world. But due to the fault of the cat of the Lord of the Underworld - Lucifax - confusion occurs, and 13-year-old Philip the Angel ends up in hell. He is kind, fair and always tells the truth. The devil hopes to re-educate the student, but to no avail - Philip is only capable of good deeds. And then Lucifer decides to penetrate the dreams of the applicant and use his most powerful weapon against him - lies. Philip is forced to agree that it is much easier and simpler to be evil and insidious. But it’s not at all easy to forget what you really are...