Code：Realize.Cardia is trapped in Nautilus. Lupin desperately thinks about a way to get her back, but there is no technique to defeat the big fortress powered by Nemo. Lupin attempts to get in alone, but Victor stops him, expressing that he, too, wants to grant Cardia's wish of being able to touch. Victor proposes a method to save Cardia and the world; with the cooperation of Saint, Idea and the British Army, Lupin challenges the Nautilus.