Attorney and Vietnam veteran Cal Dexter is also an avenging manhunter who sets his sights on the worst fugitives from justice. As a former "tunnel rat" who fought the Vietcong in miles of dark, twisting underground passages, Cal is used to hunting his prey in harrowing circumstances. Now he's after Zorah Zilic, a Serbian leader who's murdered the grandson of a mining tycoon. Cal is paid to lead a foray against Zilic's South American stronghold, but he soon finds that traitors abound in the shifting political climate and that he can't trust anyone.