Mrs Ada Harris and Mrs Florence Brown, have been friends for over 65 years. For the majority of that time, Ada has been keeping a secret that only the 'Clean 4U Agency' - which somewhat curiously, is not listed in any phone book, knows about. Ada is advised to take a holiday. She arrives at The Sea Bridge Hotel only to find that the recent deaths of solicitor Alistair Walsh and spinster Mirabelle Davenport, remain unsolved. Using well-practised techniques and a few 'tricks' of her own, Ada questions the main players, but can she get to the truth?