While exploring Halley's Comet, the Churchill space shuttle expedition discovers a bizarrely shaped alien ship, and inside, three humanoids in glass sarcophagi, two men and a woman. They take the find aboard and head for Earth. Some time later, the British space agency, opening the Churchill, which arrived and did not respond, finds traces of fire inside, badly mutilated bodies of the crew and three sarcophagi untouched by fire. It was a big mistake to take them for research - soon the woman, having drained the guard dry of life force, escapes from the laboratory, and something inexplicable happens to the bodies of her victims. At this time in Texas lands an escape pod with the captain of the “Churchill” - the only person who can shed light on the devilishness going on in London.