"I've been a scoundrel, a thief, a blackmailer and a
whore, but never a murderer. Until now..."
The year is 1929. As
the world teeters on the brink of a global recession,
Bletchley Park plays host to a rather special event.
MI5 is celebrating its twentieth anniversary and a
select band of former and current employees are
gathering for a weekend of music, dance and heavy
drinking. Among them is Sir Hilary Manningham-Butler,
a middle aged woman whose entire adult life has been
spent masquerading as a man. She doesn’t know why she
has been invited – it is many years since she left the
secret service – but it is clear she is not the only
one with things to hide. And when one of the other
guests threatens to expose her secret, the
consequences could prove disastrous for everyone.