The story follows two young boys, Akio and Tom (brothers played by Nobuhiro Kajima and Christopher Murphy), who are watching a spaceship land near their home. As they investigate, they are suddenly transported to a distant planet called Terra. On this alien world, they discover a lush landscape filled with bizarre creatures and a mysterious city.
The boys soon realize that Terra is not as peaceful as it appears. They encounter two young alien women, Barbella and Flobella, who try to befriend them. However, the boys quickly learn that the alien women have a sinister agenda—they plan to eat the boys' brains.
Gamera, the giant turtle kaiju, comes to the rescue of the young boys. He battles the alien creatures and their guardian, Guiron, a knife-headed monster with a deadly weapon on its nose. Gamera and Guiron engage in an epic showdown, and the fate of the boys and the entire planet of Terra hangs in the balance (1969).
Director: Niisan Takahashi
Stars: Nobuhiro Kajima, Miyuki Akiyama, Christopher Murphy