Freddy Farr, millionaire owner of the Angel, trying to shake a Belgian countess, is then shaken down by a gangster Holtz- for $100,000, and the seizure of the yacht brings Holtz and other undesirables aboard. Sam Blake, Farr's seagoing chauffeur, tries to keep the peace but one man is murdered- while the police in Monaco are alerted by the dotting of an i in a signature.... Maybe not to catch Her Grace- this time- but to keep up with a Monegasque-conscious rather than mystery-minded public.