Battling through the labyrinth with the skills Vicius once mocked as worthless, Touka reunites with Seras and his allies. Eve finds herself facing off against Ars, the First Hero, in a fight where the odds seem stacked against her. And meanwhile, unbeknownst to the rest of the heroes, Kobato and Asagi approach Vicius with an interesting proposal. Could Touka's worst fears have come true? Is his long-desired revenge about to be foiled by betrayal at the crucial moment?