Johan Falk: Alla råns moder

Some men infiltrates the retired chief engineer Arthur Jönsson's home. They look through the residence for a few drawings. Some time later the same men| who turnsout to be former Swedish military| performs a robbery. A robbery that Johan Falk and his colleagues at GSI believes is just a rehearsal of a much larger robbery. Arobbery| as it turns out| will make all other robberies in police history pale in comparison.