MI-5 is brought in by the Bank of England when £1 billion is stolen from one of England's oldest banks, Bowman's. The trader who seemingly arranged the swindle cannot be found the head of the bank, Sir Richard Bowman claims to know nothing of the swindle. From the outset, Harry and Tom sense they are not being given the entire picture and suspect that there is more to this story. They are particularly suspicious of Amanda Roke, a political counselor to the Chancellor. MI-5 sends in Danny undercover as a trader and Zoe as a cleaner to see what they can find. When it becomes apparent that Roke knows of the undercover operation, it seems MI-5 has a security leak. Zoe is called on the carpet when it turns out her lover may be part of thew larger scheme.
—garykmcd