Dullahan, a top leader in the Devil King's army, yet again appears at the city in a frenzied rage.

Kazuma runs into some adventurers he knows while out for a walk and decides to go with them to a shop run by succubi said to show its customers enticing dreams.

Darkness, Aqua, and Megumin are back to continue their quest against the Devil King. Kazuma is back too, but the only adventures he has waiting for him exist within the criminal justice system.

The party makes their way to Arcanretia, a city known for it's recuperative hot springs! But what they don't know about the city might spell doom for their vacation.

Kazuma's incorrigible ego forces him and his unmotivated idiosyncratic party to accept quest after dangerous quest following his bragging in front of his first hardcore fan. This time, the adventurer's guild requests that they take out a giant golem guarding ancient ruins...