When he returns to Earth to attend the wedding of his friend in Saipan, Musashi meets a beautiful girl named Shau who claims to come from the bottom of the sea. Just then, Monster Scorpis reappears in the sky above the island and Musashi faces the monster in order to protect the girl. What is the girl's true form? And what is the strange shadowy form that follows the monster Scorpis?
杉浦太陽
as Musashi Haruno / Ultraman Cosmos
Miho Kaneko
as Mari Kawase
松尾政寿
as Alien Gyashi Jin
斉藤麻衣
as Alien Gyashi Shau
風見しんご
as Kido
斉藤りさ
as Hyuga
加瀬信行
as Kanou
中村浩二
as Makabe
林泰文
as Tsutomu Sasaki
Ryou Nitta
as Shoji
Rowena Ogo
as Rita
Sanae Natsukawa
as Boys and Girls of Blue Area 1
