A mission to the moon soon runs in to trouble as the technology stops working. The astronauts led by Rhodan (Lang Jeffries) discover they are not alone. A race of super-advanced aliens (who oddly enough look just like us) are already on the moon.
However, their leader Crest (John Karlsen) is dying but there is a medicine that can save him on Earth. Unfortunately, enemy agents and robots are out to make matters complicated...
An enjoyable science fiction film though the decent start does tail off and lose energy once the film returns to Earth. The film is full of cheese though and sexy space escapades with some interesting variations on the space exploration / alien encounter theme.