After a trip to the dentist government minister Lord Mauncey enters a secret vault and attempts to steal the F File, which contains the country's most important defence information. He is gassed before he can leave and captured by Major Duncan, head of M7. Duncan calls in the Champions to see if they can steal the file, proving the need for a better security system. Mauncey does not know why he entered the vault and he is then killed. Richard enters the vault but memorizes the file's contents before escaping, though he is pursued by heavies, who take him to the man who wants the file. Craig traces a link between Duncan and Mauncey having the same dentist, after Mauncey is hypnotised, as Dauncey was, by the dentist. He has then to get to where Richard is being held before he spills the beans.
—don @ minifie-1