Unconscious, unaware, Ripley is the last human survivor of the Nostromo, her shuttle lost in deep space. Meanwhile, the crew aboard the mining ship Marion, faces a catastrophic collision with one of its own dropships and has to contend with the alien infestation on board.

Marooned in a decaying orbit above the planetoid LV-178, the crew struggle to tackle the threat at hand, when an unexpected visitor makes her presence known.

Ripley’s shuttle has docked with the Marion. She arrives traumatised, only to find her rescuers under attack by a familiar foe. To make matters worse, it seems that Ash, an android she’d thought killed aboard the Nostromo, has uploaded his AI routines into her shuttle’s computer.

Outside, the ship’s orbit is decaying faster than expected. The crew has just days to escape before they burn up in LV-178’s atmosphere.

Ripley and the crew aboard the Marion are running out of options to escape certain death. Their orbit is decaying rapidly. With only a few days to decide, they settle on a plan. If they can deal with the alien infestation on board the Samson, their remaining undamaged dropship, they may be able to return to LV-178’s mining installation and retrieve the vital fuel they need to escape on Ripley’s shuttle.