Eriko Wada

Seijuro Fujihana, head master of the Fujihana dance school, is a proud and lonely artist. And because of his character, his group lacks the prosperity of others. He wishes his daughter Kasumi, gifted like himself, to take over and develop the Fujihana, but she wishes to marry Hiroshi, head of a jazz band which her father opposes. Kisaburo, Seijuro's No.1 disciple, wants to marry Kasumi and take over the Fujihana with the backing of the chairman of the supporters' association.

Haneda, the president of a company dealing in gold, is shot to death on the Raicho 9 limited express from Osaka to Kanazawa. Detective Kamei begins an investigation in cooperation with the Fukui Prefectural Police. In the Green Car, Detective Nishimoto had noticed a beautiful woman talking to the victim just before he was killed. Looking into her background, she turns out to be Yumiko Miura, living in Setagaya in Tokyo. An eyewitness who claims that she is the murderer also appears, and she is taken into custody. Before long, the victim's unexpected relationships will be revealed one after another...

L'empire souterrain Tublar envoie la princesse Laru dans le monde extérieur pour espionner le projet Maskman. Mais sa mission échoue et elle tombe amoureuse de Red Mask. À la suite de cette amourette, elle est capturée par l'empire souterrain qui la juge pour trahison et est enfermée dans un cercueil de glace par l'empereur Zēba. Désormais, les Maskmen utiliseront tout leur savoir pour vaincre le Tublar et délivrer Laru.

Pour lutter contre l’organisation criminelle internationale Big Nova, une équipe secrète de la police internationale est formée de 5 personnes, Strada 5.