As new recruits at UQ Holder headquarters, Tōta and Kurōmaru must first pass a test, so they are dropped into a monster-filled underground maze from which they must escape within eight years.

Tata, Kuromaru and Karin are on a missing protecting the poor residents of the slums when they come under the fierce attack by powerful enemeis who seem to specialize in hunting down and killing immortals. Tata and Kuromaru take a nasty beat down and in a moment of desperation, Tata finds a new power that may be great or terrible or both!