The film's plot is based on the real murder of the Soviet diplomatic courier Theodor Nette abroad. The pouch of the Soviet diplomat, which is stolen by British spies, is taken away by the sailors of a ship sailing to Leningrad who deliver it to the authorities. The intelligence agents make every effort to retrieve the bag.
as Embassy Secretary
as First Diplomatic Courier
as nd. Diplomatic Courier
as Helen Viskovska
as Spy
as Insp. White
as Harry
as Ralph
as Captain of Ship 'Victoria'
as Stoker
as Sailor-Boxer
as Passenger