In a quiet residential area, a group of criminals poses as musicians to carry out an elaborate robbery plan. Led by the cunning and charismatic Professor G.H. Ackerly, this group of misfits intends to use the peculiar home of a sweet but naive elderly widow, Mrs. Wilberforce, as the base for their criminal strategy. The lady quickly becomes the key piece of the puzzle, unaware of the danger surrounding her.
As the plan unfolds, the situation becomes more complicated. The criminals, with divergent personalities and dubious habits, have to deal with the growing suspicion of the elderly woman, who shows an almost childlike curiosity about their activities. Everything becomes even more convoluted when her strange behavior catches the attention of the police, jeopardizing their intentions.
The plot slides between hilarity and tension, with a constant game of cat and mouse as the thieves attempt to throw Mrs. Wilberforce off their scent while their plans begin to crumble. With witty dialogue and a charismatic cast, the story becomes a biting commentary on crime and morality. In the end, it’s a dance of comedy and suspense that leaves us questioning who the real "thieves" are.