Overrun by Kaiju and pinned behind enemy lines, Kiki could really use the help of the newly merged Ultraman - but what went wrong with the merging process, and how will that impact our hero?

With that to deal with, Shin must also decide whom to trust - the benevolent-seeming but deeply secretive USP or the bitter whistleblower Dr. Yamamoto... And a wrong choice could cost him everything he holds dear!