Air Force Lt. Col. Kevin Parks was convicted for the murder of a woman with whom he was alleged to be having an affair. When his conviction was brought to the Court of Appeals, Perry Mason was the Associate Justice there. The appeal was not successful and Parks went to prison.
Eighteen months later a new witness comes forward and a second appeal is filed. By this time Mason has left the bench and he is retained as Counsel for the second appeal. The new witness is murdered and Parks is the one charged with the crime.