Columbo arrives at a kidnapping case, which at some point turns to murder. Everything seems to be related to a trust fund managed by the uncle of the victim who has a great love for flowers.
The manager of a football team murders its callow owner, making it look as if the young man had had an accident in his swimming pool. Lt. Columbo is on the case.
A surgeon has an ingenious plan for murdering his partner in a research project, but a paranoid nurse quickly catches onto his scheme, so he kills her. Lt. Columbo has a tough time figuring this one out.