Under mysterious circumstances, lawyer Sam Vincent, an old friend of former Marine Earl Swagger, disappears in the small American town of Thebes. While trying to save his friend, Earl falls into a trap. And he ends up in the local prison. From this terrible world, where prisoners are subjected to inhuman torture, there is only one way out - death. However, Earl manages to escape from there. Having assembled a small squad of the toughest and most ruthless marksmen he knows, he returns to Thebes to wreak bloody revenge.