 In September 1971, thieves tunneled into the vault of a bank in London s Baker Street and looted safe deposit boxes of cash and jewelry worth over three million pounds. None of it was recovered. Nobody was ever arrested. The robbery made headlines for a few days and then disappeared - the result of a  D  Notice, gagging the press. This film reveals what was hidden for the first time. The story involves murder, corruption and a sex scandal with links to the Royal Family - a story in which the thieves were the most innocent people involved.