Christopher Walken stars in John Irvin's graphic adaptation of Frederick Forsythe's novel about a mercenary sent to overthrow the government of an African country. Walken is Shannon, an American soldier of fortune who has staged incidents in Central America and Africa that helped topple governments. Shannon decides to take on one more mission when American businessman Endean (Hugh Millais), working for a large mining company wanting to move into an African country, hires Shannon to scout out the terrain of the country and see if the government is weak enough to be overthrown. Shannon assumes the guise of a photographer for a nature magazine and travels through the country, meeting a wide-array of people. But the government becomes suspicious of Shannon and throws him in jail, where, between torture sessions, he meets an imprisoned dissident leader. Through his imprisonment, Shannon comes to understand more fully the struggles of the African country.