Aliens from the planet Hydra land on Earth and kidnap a group of humans, including a scientist, his daughter, and a couple of spies. Soon all are hurtling through space on the way back to Hydra Hibernating robots, aliens with incinerating rays, a planet of ape monsters, photon showers, and a spaceship of skeletons are all featured. Tight bikinis, and miniskirts are the galactic fashion in this cool Euro outer space epic.