![William Hopper](http://image.tmdb.org/t/p/w92/lv9KfbxJP01uSlw7ZnjzHP9aT1b.jpg)
When the first manned flight to Venus returns to Earth, the rocket crash-lands in the Mediterranean near a small Italian fishing village. The locals manage to save one of the astronauts Colonel Calder, the mission commander. A young boy also recovers what turns out to be a specimen of an alien creature. Growing at a fantastic rate, it manages to escape and eventually threatens the city of Rome.