Green hell. A desperate call for help on behalf of an old friend puts Mack Bolan in an awkward position. Dr Nathan weiss is plying his life saving skills among the Brazilian tribes embroiled in Civil War in the heart of the blood drenched amazon. Bolan is not sure weiss wants help, yet The Executioner's combat sense tells him weiss is part of something bigger. And finds it on a collision course with government death squads holding hands with CIA Black Ops who view weiss as a liability to the us.