Based on the screenplay by Dan O'Bannon. The crew of the spaceship Nostromo wake from cryogenic sleep to distress signals from an unknown planet. One is attacked when they investigate a derelict alien craft. Safely on their way back to Sol, none foresee the real horror about to begin.

Having survived one encounter with an alien, Ripley is persuaded to return to the planet where her crew found the alien ship. A colony has been established there, but suddenly all contact with the settlers has been lost. Accompanied by marines, Ripley is going to find out why.

Here, even the wind screams. Abandoned hulks of machinery rust in the colorless landscape. Dark, oily seas beat against a jagged black shore. And the remnants of a reentry space vehicle crash into the rough waves. In it sleeps Ripley, a woman who has battled the enemy twice. It killed her whole crew the first time. The second time, it slaughtered a spaceload of death-dealing Marines. Now on this prison planet that houses only a horde of defiant, captive men, she will have to fight the ultimate alien horror one more time.

At the farthest reaches of the solar system, Ellen Ripley awakens on board the space station "Auriga". Her last memory is of her own fiery death. And yet she is somehow alive. Ripley discovers that her "resurrection" is a result of an incredible experiment which has altered both her and the creature she has been carrying. To combat the incalculable alien menace, she teams up with a renegade band of space smugglers.

Ridley Scott returns to the universe he created with Alien: Covenant, a new chapter in his groundbreaking Alien adventure. The crew of the colony ship Covenant, bound for a remote planet on the far side of the galaxy, discovers what they think is an uncharted paradise. But it is actually a dark, dangerous world.