It is 1924, Tommy Shelby is caught in a dangerous web of international intrigue as he battles with forces that threaten to split his family apart.
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When he receives a mysterious letter, Tommy realises the Shelbys are in danger.
As the Shelbys come to terms with shocking events, a bold new enemy makes his move.
Tradition weighs upon Arthur as Changretta finds a chink in the Shelby armour.
Tommy's enemies edge nearer as an old friend makes a welcomed return.
The bloody battle lines are drawn and a treacherous deal is struck.
A stunning betrayal threatens to end the Shelby empire for good.