In the magical city of Eldermere, where laws are optional and common sense is a myth, Bartholomew "Barry" Blunderfoot—the world's most incompetent wizard—accidentally summons a demon lord… who turns out to be a disgruntled housecat named Lord Whiskerion the Destroyer. Now, Barry must: Hide the fact his "demon lord" is just a very opinionated tabby Avoid the wrath of the actual demonic cult trying to reclaim their "master" Deal with Whiskerion's demands for tuna sacrifices and belly rubs Oh, and the city's entire magical bureaucracy is after him because he technically didn't have a summoning license. (Chaos ensues.)