Trouble abounds when two elderly members of a Prisoners' Aid Society decide to use their unique knowledge to pull off 'the robbery of the century' by looting upmarket department store Harrods. They rapidly find themselves involved with rival gangs, the Mafia and nude shop assistants.

This is the first of Wally K Daly's trilogy of criminal gang capers produced on radio in the style of old British comedy films, along with A Right Royal Rip-Off and The Bigger They Are.