Five oddball criminals planning a bank robbery rent rooms on a cul-de-sac from an octogenarian widow under the pretext that they are classical musicians.

A gang planning a 'job' find themselves living with a little old lady, who thinks they are musicians. When the gang set out to kill Mrs Wilberforce, they run into one problem after another, and they get what they deserve.—Rob Hartill

A gang of five diverse oddball criminal types rent a two room apartment in an isolated house on a London cul-de-sac from an octogenarian widow with three pet parrots. The group's mastermind, Professor Marcus, tells her a cover story that they are members of an amateur string quintet and would like to use the rooms to hone their musical skills. In reality, they are plotting to rob a bank and plan to use Mrs. Wilberforce's naiveté and her Victorian sensibilities to their advantage.—duke1029

Elderly, widowed, doddering but strong-minded Louisa Wilberforce, all alone in the world except for her three pet parrots and a handful of similar friends, routinely rents out two rooms in her house, her most recent lodger being Professor Marcus, who has taken both rooms available so that he and his four friends - Major Courtney, Mr. Harvey, Mr. Robinson and Mr. Lawson - can rehearse as a string quintet. That is all a guise as Marcus is a criminal mastermind, who, with the other four, his current team all using aliases, are planning their latest crime out of the house, the crime namely an armored vehicle robbery. Marcus is betting on Mrs. Wilberforce being true to what he knows of her nature, which will allow him to use her as a dupe in the plan. But as certain aspects individually come to light of the crime, Marcus and the four have to decide what to do even if they believe that Mrs. Wilberforce has figured out what's going on. What they decide to do may take into account that Mrs. Wilberforce is friendly with the police, they not knowing that the police in turn largely humor her in being the proverbially harmless little old lady.—Huggo