Hazel is a lonely little girl who struggles to make friends. One day, while in the library with her father, she wanders into a deserted room where she finds a mystical spell book. Within the magical tome, Hazel discovers a spell that she believes will allow her to summon a friend, but, she accidentally misreads it and summons a ferocious demon named Dantalion, who must help Hazel to find a real companion before he slinks back to the underworld…