The forensic team gathers cognition particles from the Challenger and Narihisago, with Hondomachi diving into Narihisago's id well to discover if he had contact with John Walker. Although Walker is not found, Hondomachi stumbles upon an active Mizuhanome cockpit linked to Kiki Asukai, the last victim of the Challenger. Momoki discloses that he saved Kiki, but has not seen her since the Challenger investigation. Before she can be extracted, Hondomachi dives into Kiki's id well while still in Narihisago's well...