In a remote town in war-torn Eastern Europe, a mysterious businessman gathers a crack team of battle-hardened ex-soldiers to undertake a dangerous mission into no-man’s land to scope out a long-abandoned military bunker. When they reach the outpost, however, the men discover the horrific remnants of bloody and unnatural experiments carried out during World War II. As the fighting rages above ground, the men find themselves trapped below…and they are not alone. From the darkness emerges a lurking terror that starts to pick them off one by one. Hired to safeguard another, the men must now struggle to save themselves!