Unusual volcanic activity in Japan awakens Gyaos, a bloodthirsty flying monster with the power to slice things in half with an ultrasonic ray. While scientists and the military scramble to devise a way to stop this new threat, a young boy forms an alliance with Gamera; a monster no one else seems to trust.

Two young boys sneak aboard a spaceship and find themselves whisked away to the mysterious planet Terra. There, they encounter Gamera's old foe Gyaos and two female aliens with a taste for human brains. Gamera must save the children and battle the new monster Guiron, whose entire body is a deadly living weapon.

Kobayashi Akira stars as a wandering musician, who lost his brother and lover to dishonest rival Henmi. The third work in Nikkatsu's "Gambler" series.

Ginjiro was born to a family of nobility, though he yearned for freedom. To earn this freedom, he affiliates himself with the worst of the worst. Swearing his allegiance to the notorious Kuroiwa crime syndicate, the yakuza family known for its thirst for blood, Ginjiro equips for battle. When a rival family raids their gambling parlor, he slashes a masked henchman. Unbeknown to him, his victim was no henchman.