Bound for a remote planet on the far side of the galaxy, the crew of the colony ship Covenant discover what they think is an uncharted paradise, but is actually a dark, dangerous world, whose sole inhabitant is the synthetic David, survivor of the doomed Prometheus expedition.
In the distant future, the crew of the commercial spaceship Nostromo are on their way home when they pick up a distress call from a distant moon. The crew are under obligation to investigate and the spaceship descends on the moon afterwards. After a rough landing, three crew members leave the spaceship to explore the area on the moon. At the same time as they discover a hive colony of some unknown creature, the ship's computer deciphers the message to be a warning, not a distress call. When one of the eggs is disturbed, the crew realizes that they are not alone on the spaceship and they must deal with the consequences.