After the successful assassination of his older brother, Xavier, the party boy deviant, is forced to take over ruling as Prince of The Underworld. It's all fun and games until the welcome party with his subjects is ruined by a pissed off Demigod coming to collect on a promise his dear, dead brother stupidly made. Xavier has no intention of making good on the deal, especially when he finds out it involves him. But when the Prince of the Underworld takes on a Demigod, they find their murderous blood-thirst isn't that far from lust, and until they can break the spell keeping them both invincible, they might as well enjoy themselves.