Tommy establishes a connection between crime and political power that could alter the course of history. He also receives life-changing news from an unexpected source.

A war veteran who fought in the trenches, Tommy Shelby has been a gangster, an entrepreneur, a captain of industry, a spy and ultimately a Member of Parliament. In the course of this odyssey, he has taken on numerous criminal organisations, business adversaries, foreign insurgents, and the British Establishment itself.

Now, in the 1930s, as the clouds of the coming storm gather, he faces the consequences of his experiences and his actions.