Mal Reese is in a real bind - owing a good deal of money to his organized crime bosses - and gets his friend Walker to join him in a heist. It goes off without a hitch but when Reese realizes the take isn't as large as he had hoped, he kills Walker - or so he thinks. Some time later, Walker decides the time has come get his share of the money and starts with his ex-wife Lynne who took up with Reese after the shooting. That leads him on a trail - to his wife's sister Chris, to Reese himself, then onto Big Stegmam, then Frederick Carter and on and up the line of gangsters all in an effort to get money from people who simply won't acknowledge that he's owed anything.

Detective Virgil Tibbs is caught up in the racial tension of the US South when he is arrested after the murder of a prominent businessman. Tibbs was simply waiting for his next train at the station in Sparta, Mississippi and the confusion is soon resolved but when local police chief Gillespie learns that Tibbs is the Philadelphia PD's number one homicide expert, he reluctantly asks for his assistance. The murdered man, Mr. Colbert, had come to Sparta from the North to build a new factory and his wife and business associates immediately point the finger at Endicott, the most powerful man in the county and the one who had the most to lose if a major new employer comes to the area. Tibbs' life is clearly in danger but he perseveres in a highly charged and racially explosive environment until the killer is found.

A former British spy stumbles into in a plot to overthrow Communism with the help of a supercomputer. But who is working for whom?