A mysterious man, Dean, returns to his hometown of Grimsby after many years abroad in the Army. His arrival is met with animosity, particularly from his father, an avid pigeon racer. Dean is drawn back to confront his demons, and confess a secret to a childhood friend, Jess, only to discover she has been struggling since the untimely death of her husband. Whilst attempting to raise her child and battling a crumbling economy and dearth of opportunities, she is pulled into a harsh underworld. Dean must help her, throw her a lifeline, but the situation only darkens. When their lives are threatened he will do all it takes to make sure she is safe.

唯有间谍，才能追捕间谍。                                                                      　　特工乔治·伍德豪斯（迈克尔·法斯宾德 Michael Fassbender 饰）的妻子凯瑟琳（凯特·布兰切特 Cate Blanchett 饰）被怀疑背叛国家，乔治面临着终极考验——对婚姻还是国家忠诚。