A pawn shop owner alerts Friday and Smith when a man claimed to have purchased an expensive ring that turns out to be junk and then asked the pawn shop owner to sell him a gun. Friday and Smith find the man and learn he is the latest victim of two con artists, Ernest Wilcoxson and Parker Cleaver, who are now working with a third man named Norman Crist. But when Crist is found dead in a car accident, the two conmen cannot be prosecuted.