"Frankie" is responsible for "Johnny’s" demise, leading to a courtroom appearance where she’s oddly attired as if readying herself for a Flamenco performance. Her legal representation brings in the bartender—a rather gloomy individual—who then recounts details of the deceased's affairs with "Nelly Bligh." Following this, "Nelly" testifies and offers her account, insisting that any physical contact was limited to piano playing. The situation seems straightforward at first glance. Will the sophisticated lawyer be able to secure an acquittal for her? He presents a contrasting interpretation of what transpired. Which narrative will sway the jury? The story unfolds through spirited and humorous lyrics accompanied by a vibrant jazz score, and the animation’s distinctive, somewhat austere style effectively conveys a sense of underlying threat, occasional Freudian slips, and... It's quite entertaining, and you should definitely stick around for the surprise at the conclusion.

Source on TMDB