The space shuttle Churchill is assigned to observe Halley's Comet under the command of Colonel Tom Carlsen. They see a strange form attached to the comet and Carlsen goes with a team to investigate. They find three humanoid life forms in caskets and they bring them to the Churchill. However, Earth loses contact with the shuttle and the Space Research Center sends another spacecraft to search the Churchill. They find the crew dead and the shuttle burnt and one rescue pod missing. They bring the...