Doug Underbelly is doing his best to be normal. It's not the easiest thing in the world: He's bad at jokes, he's lousy at sports, and he lives in a creaky old mansion surrounded by gravestones. He's got Magda who won't leave him alone. He's got a bully. Best of all, he's got a crown because he just happens to be King of the Mole People. Doug didn't ask to be King - it's a job he can't really avoid, like the eel sandwiches his dad makes for him (with love). Eager as he may be to escape his fate, Doug sets out to solve the mystery destroying the underworld by taking on the feuding groups - the Mole People, the Slug People, the Stone People, and let's not forget the Mushroom People. Is it possible to restore order in the nether realm and gain a few friends in the process? It's all a matter of diplomacy!