Captain Addison is proud not to be a cog in the Weyland Yutani machine for her piece of the pie - an independent operator of the "Rust Raptor," a salvage ship and crew that traverses the galaxy picking up after wrecks, disasters, and failed colony attempts. But, as the richest corporation in the universe, sometimes you have to play ball with them.

While on a routine run contracted out by Weyland, Addison and her crew intercept an unusual SoS. Contractually obligated to investigate, Captain Gray touches down on an unknown moon, LV-2032.

Unbeknownst to Gray and her crew, LV-2032 is home to the Obsidian Sector Laboratory "Tartarus Deep," a bio-weapons division of the Weyland Yutani Corporation.

Suddenly, they find themselves held prisoner for an innocent mistake and keeping to regulations. Kept under the watchful eye of the Complex Administrator, Driver - a synth - Addison is isolated from her friends and crew at an increasing rate. As her crew members disappear, she begins to hear screams in the night.

In a race against time with a sadistic synthetic, a rogue AI with unknown intentions, and strange, bioluminescent, serpentine creatures that stalk the jungles outside the complex, Addison must rescue her crew, destroy the facility, and secure the future of the human race.

All the while, something else watches from the shadows...