Stone was a mercenary and a member of Max Stafford's private military team. In 2004, Stafford's team was hired by Charles Bishop Weyland to accompany a Weyland Industries expedition to Bouvetøya, Antarctica. The expedition's objective was to investigate an ancient Pyramid buried beneath the ice there, with Stafford's team present to provide security. The Pyramid was discovered to be a Yautja temple and hunting ground where the Predators would breed Xenomorphs for use in their Hunts, and the expedition soon became caught up in the battle between the two species.
Stone was killed by Scar when his team was ambushed by the Predators.
Stone was killed while covering the expedition team's rear when he inadvertently walked into a noose hung from above by Scar. His body was lifted up and silently hauled away before the rest of the group even realised he was in trouble.