Columbo is a friendly, verbose, disheveled-looking police detective who is consistently underestimated by his suspects. Despite his unprepossessing appearance and apparent absentmindedness, he shrewdly solves all of his cases and secures all evidence needed for indictment. His formidable eye for detail and meticulously dedicated approach often become clear to the killer only late in the storyline.
Cathleen Calvert and her lover, crime scene investigator Patrick Kinsley, plot to get rid of Calvert's husband, Clifford, a powerful businessman, by killing an investment broker with whom he is currently feuding, and pinning the murder on Clifford. As long as he is alive and in prison, Cathleen has access to all his money. Columbo must uncover a criminal who is part of the team handling the investigation.