“Robbery on a Baker Street” is one of the versions of the largest bank robbery in the UK, committed in 1971. Public intelligence service becomes aware that documents discrediting members of the royal family, and other documents, harming state security are kept in one of the individual cells in bank. Since the seizure of these documents may not be official, an idea appears to disguise it under usual robbery, though sacrificing the money of depositors. This idea was neatly tossed to Terry Leather the owner of bankrupted business, inclined to such a venture in the past. Suspecting nothing about the background of its dual operation, Terry takes on the case ...