Bounty hunter Samus Aran encounters Ridley when he invades a space laboratory. He takes off with a baby Metroid and Samus follows him to Zebes. Meanwhile, two warriors in their mid-twenties are mapping out uncharted territory when they are sucked in through a warp zone, which landed them near Zebes, seven thousand light years away from home. The two men end up assisting Samus.

Crossover between the Metroid and System Shock series. Both series belong to their respective owners.