An unlikely duo: an apprentice witch carrying the Devil in her backpack! The Bruja, the most powerful of witches, disappeared just after creating an elixir that could change the face of the world! Norah, her niece, a not-so-talented witch-in-training, decides to go looking for her. Meanwhile, locked in her manor, hungry and thirsty after waiting for several days, the demons that are Bruja's familiars attempt a ritual to summon forth a cornucopia--a "horn of plenty"--but by mistake call up...the Devil himself! They hadn't expected Norah to interrupt the ceremony. It's not just the ritual she cuts short, but the Prince of Shadows, too--leaving him in two pieces, condemned to remain on Earth as the prisoner of a pentacle. He quickly realizes that the only way to get his legs back and regain his throne is to find the five demons who guard the Gates of Hell. Norah agrees to help the Devil get around, on the condition that, in return, he helps her locate her aunt. This unlikely duo leaves on a mission, the Devil lugged about in Norah's backpack--the Master of Hell subservient to the will of a progressive, modern young woman.