It began in dank, green world of rotting vegetation. A world of oppressive heat, of loathsome insects and even more loathsome disease. Strange that that should have been the setting for a silent, deadly battle for the souls and minds of men. Ken's old friend, a doctor, has been murdered at a little village up the Amazon river in Brazil, doing good in the world, establishing a medical clinic to try and stamp out disease - so Ken is heading out to Brazil to get to the bottom of why someone would kill the doctor.