On the run and with nowhere to hide, a group of mercenaries find themselves surrounded by an unidentified enemy. As gunfire hails down and their mysterious pursuers begin to close in, they must keep moving to find safe shelter.

The only chance of survival is to hide inside an abandoned tank discovered by an inexperienced soldier, Reeves (Rupert Evans from Hell Boy, The Boy, Man in the High Castle). Once holed up inside the tank, they quickly discover the hatch is jammed and there is no way out.

As the mercenaries begin their desperate search for anything that may aid their escape, they fall upon a shocking discovery: confidential files on dozens of soldiers; all listed as missing in action. Within those listed, are their own names.

As discoveries are made inside the tank, and they struggle to keep the forces outside at bay, little do they realise the real enemy is already amongst them, locked inside Tank 432.