A passionate communist activist, war hero, and Tommy's former best friend turned political liability.

The brilliant, calculating mind behind the family business, suffering from severe PTSD from the trenches of World War I.

– Tommy’s father, Arthur Shelby Sr. , returns to Birmingham, causing a rift within the family. Meanwhile, the truth about Grace’s identity begins to surface.

The inciting incident that places the Shelbys on a collision course with the British government.