Kosumosugottoman ga taosa reta nochi, honmono no kaosuuirusu no saihatsu o fusegu tame, Kokubōshō wa yūsuerītochīmu ni kyōryoku o yōsei shita. Ippō, sū sen-nen ni ichido no kaiki nisshoku ga semaru. Gōdō sakusen wa kitei rosendearu koto o shitta Musashi. Soredemo, urutoramankosumosu o kakusei sa senakereba, honmono no kaosuuirusu o taosu koto wa dekinai to satotta Musashi wa, kosumosugottoman o kakuchi de sagasu. Musashi ga mitsuketa yasashi-sa, tsuyo-sa, yūki ga atsumatta toki, kogane no urutoramankosumosu ni mo aratana sugata ga tanjō shita.
After Cosmos Gotman was defeated, in order to prevent the real Chaos Virus from reappearing, the Ministry of Defense invited the Youth Elite Team to cooperate with them. On the other hand, a total solar eclipse that occurs once every thousands of years is approaching. Musashi learned that the joint operation was a foregone conclusion. He knew that even so, it would be impossible to defeat the real Chaos Virus unless Ultraman Cosmos was awakened. He looked for Cosmos Gotman everywhere. When the gentleness, strength and courage that Musashi found gathered, the golden Ultraman Cosmos also ushered in the birth of a new form.
