Set in the very near future, an elite squad of highly trained marines, led by commanding officer Captain Bukes (Thure Lindhardt) are sent on a routine training exercise to a remote island – the precise location of which no one knows and from which all communications are cut off dead. Accompanying them on the mission is ‘tech head' Specialist Mills (Vanessa Kirby), a mysterious coder whose brain is interfaced with a computer.
What the unit soon discover when they reach the island is that the exercise is far from routine - they become live targets of terrifyingly advanced military robots and that Mills is somehow involved in the conspiracy. But they also know that they need Mills technology to survive the brutal situation that they find themselves in.
Cut off and facing certain death the marines must fight for their lives to survive. And at the same time they must work out who and what Mills really is – and whose side is she really on.