When Michael was 7 an Angel descended with a message and a book for Michael he was to protect his siblings from infernal kings of hell at all costs . If he came across and infernal king he was to call a destroyer to get rid of them but things go wrong when his brother Gabe and his soulmate are almost killed . Michael them begins to doubt the book and knows he’s been tricked so he summons a demon to help him find the truth and Arioch the demon of vengeance and chaos answers his summons.