Blitzø discovers that his reserved, sole parking spot has been stolen by his ex-girlfriend, succubus and famous pop star Verosika Mayday. He and the rest of the I.M.P attempt to get it back by challenging Verosika to a "demon duel."

An eccentric inventor killed by an experiment gone wrong hires the I.M.P to assassinate his now elderly business partner, only to find that he's being talked out of suicide by a rival organization.

Stolas invites the I.M.P to attend the Harvest Moon Festival, an annual event taking place in the Wrath Ring that is overseen by him. However, unbeknownst to our protagonists, an insidious plot will be transpiring there.

While on Earth, Blitzø and Moxxie are captured by demon-hunting government agents. To escape, they must fight, and come to terms with their inner fears in the process.

Moxxie and Millie celebrate their first anniversary at Ozzie's, a club in the Lust Ring. Blitzø wants in on the action, but since the club is couples only, he has no choice but to invite Stolas.