On a murky night, a police officer is on duty outside the Bank of England in London. Out of the thick fog, Lady Penelope approaches and, claiming that she is lost, asks for directions to the Tower of London. Before the officer can reply, however, he is suddenly chloroformed by Parker. After hiding the unconscious body, Parker deactivates the Bank’s alarm systems so that Penelope can blow open the front door with plastic explosives. Entering the building, the pair arrive at the Bank’s vault and Parker sets to work cracking the safe. After two and a half hours working stubbornly with just a stethoscope, one of his combinations works and the vault is opened. At that moment, employees of the Bank come out of hiding and congratulate Penelope and Parker: the robbery was engineered by Lord Silton