After certain unforeseen events, the conference between monsters and humans continues and the leaders of the nations involved will know the steps that will follow the birth of a new Demon Lord and the return of the Dragon of the Windstorm.

The announcement of the upcoming event that will bring together several Demon Lords serves as part of the plan to face Clayman. But before that, Rimuru must find a way to save the people of Eurazania, who have become the target of a diabolical plot by Clayman.