A former war hero avoids execution by joining other death-row inmates on a special forces team. Led by Major Agatha Doyle, this suicide squad's orders are to infiltrate a secret enemy weapons facility. After overtaking the enemy base with ease, they have trouble locating their adversary. While searching for the compound for advanced weapons, they make a grisly discovery; piled in the storeroom are the corpses of soldiers. Then, some of Doyle's troops are killed mysteriously. A computer disk reveals that this has all happened before. The voice of a special team commander details a deadly encounter against an unknown opponent in which his men were killed one by one. The surviving members of Doyle's team realize they must work together to destroy the demon enemy.