The discovery of an alien artefact suggests that a spaceship from Venus had crashed onto the earth, so a spaceship is sent to Venus to meet the aliens. En-route they translate the message on the artefact and discover that the Venusians plan to invade earth. This is the American dubbed version of the original Polish version. The plot has a cold war feel, but the problem is the English dialogue is almost as flat as the delivery, however the sets are quite impressive given where and when it was made. The film is based on the novel by Stanislaw Lem.