Brilliant young actress Charlie strikes up an acquaintance with an intriguing stranger while on holiday in Greece, but it rapidly becomes apparent that his intentions are far from romantic.
After his life is turned upside down when his wife is killed in a London terrorist attack, a brilliant but introverted CIA decoder takes matters into his own hands when his supervisors refuse to take action.
On a cloudy London day, an American babysitter takes care of two young British sisters and starts to realise something is amiss.
