Drifting in space for 57 years after killing the alien that slaughtered the rest of her crew, Lt. Ripley, last survivor of the spaceship Nostromo, is discovered in cryostasis by a deep-space salvaging team and debriefed by her company for an explanation of her doomed mission. She learns that the company has set up a colony on the planet where the alien was discovered, and has recently lost contact with the settlers. Though traumatized, she agrees to accompany a platoon of Colonial Marines to investigate the colony, on the condition that any aliens are wiped out. Though well-equipped and battle hardened, the Marines’ mission goes wrong, and it’s up to Ripley to draw on her past experience to try to get off the planet alive.