When Graham McVeigh kills his brother and frames a mob bookie for the crime, then kills the bookie and claims self-defense, he finds himself facing trouble from both Columbo and the bookie's superior in the mob.
Findlay Crawford, a Hollywood film composer and conductor, murders a talented composer/musician who has been ghostwriting most of Crawford's work in recent years, including the entire score for the last film, which won an Oscar. Crawford is jealous of the young musician whose talent outshines his own. Will Columbo find out who did it? It's just one more thing.