In 52 B.C. in Gaul, Legionary Titus Pullo and Centurion Lucius Vorenus are assigned to find and bring back Julius Caesar's stolen eagle.
Julius Caesar continues his victories near the Italian border, which brings fear to his enemies in Rome.
Pompey finds himself forced to order a retreat and has his citizens pick sides, while Caesar is rapidly advancing towards Rome.
Pompey and the others flee while Atia and her family stay behind, and she holds a celebration for her triumphant uncle Julius Caesar.
Caesar plans on meeting with Pompey before taking the final step in the war.
Pullo continues young Octavian's training in the usage of weapons.
While trying to reach Caesar in Greece, Vorenus and Pullo, having been shipwrecked, face an unexpected dilemma.
Caesar intervenes to fix things between Ptolemy and his sister Cleopatra, to make sure Rome's grain supply is not cut off and to access Egypt's treasures.
With Cato and Scipio defeated, they go to the African city of Utica in the aftermath of the Battle of Thapsus, where they make a decision to end it all.
Cicero predicts that Caesar will be an unprecedented dictator who will rule for ten years.
When Pullo is arrested for killing one of Caesar's common enemies, he further incriminates himself by refusing to name who hired him to do so.
Vorenus wins himself an unexpected position of power within Rome when he defends Caesar.