Risei informs all the active Masters that the war is to be put on hold until Caster, whose killings of children are attracting the public attention, is destroyed, with an additional Command Spell as a reward. In Einzbern Castle, Kiritsugu plans to use the hunt for Caster to attack the other Masters, despite Saber's protests that they should give priority to stopping Caster's atrocities. As Kiritsugu confides in Irisviel that he would rather escape with her and their daughter and live in peace somewhere, Irisviel detects Caster arriving from the forest with more children to be sacrificed and sends Saber after him. Saber is ambushed and cornered by Caster's Noble Phantasm called Prelati's Spellbook, which enables him to summon monsters, until Lancer appears and joins forces with her. As Irisviel and Maiya leave the castle, Kayneth, who had survived the hotel bombing thanks to his Volumen Hydragyrum, a giant magical blob of mercury, infiltrates the castle to duel Kiritsugu, who evades Kayneth using his Calico M950 and launches a surprise attack with his Contender pistol.