While Asta and Liebe remain at the mansion to perfect the technique of union, Nacht joins the elite team of the Knights-Mages of Clover. Together, they go to Spade just before the Qliphoth ceremony! With the help of the members of the Resistance, they try to obstruct the ritual. But, in addition to the Dark Triad, a new enemy is emerging... and a terrible threat is about to come to the world!