Eager to return to Rome after eight long years of war, Gaius Julius Caesar ends his campaign with a resounding triumph in Gaul, and news of a shattering personal loss at home. In Rome, Caesar's old friend Pompey is counselled by the Senate, who worry about Caesar's growing popularity. Two soldiers are enlisted to find the army's stolen gold standard. Atia is careful to play both sides of an escalating power struggle.

Mark Antony heads back to Rome in order to speak on Caesar's behalf, in which Lucius Vorenus and Titus Pullo are stationed to go with Mark Antony, as well as the recently rescued Octavian. At Rome, Lucius Vorenus heads home to see his family for the first time in eight years while Pullo looks for some pleasure, though when Pullohugs a man who tried to cheat him in a game, he sets off a chain of events that could potentially bring down the republic.

Julius Caesar is making his way towards Rome, though Lucius Vorenus is contemplating while the army has encountered so little resistance during their patrols. In Rome, Pompey begins ordering a retreat of his forces and he assigns his best men to take the entire city's treasury to their planned destination. Meanwhile, Atia plans on using foul play in order to force her daughter to stop loving a lower class citizen.

Julius Caesar is attempting to fully establish his position in Rome, in which he decides to attend a party that Atia is holding in order to celebrate his victory. Meanwhile, Lucius Vorenus decides to hold his own party since he has retired from the military and is working as a civilian businessman, while Titus Pullo contemplates what he should do with all of the gold that he found, though he soon encounters Pompey's son and he takes Vorenus' advice to take him to Caesar.

Pompey decides to send Caesar another offer in hopes of limiting his power, in which Caesar decides to take some time to think upon the issue, despite Mark Antony's objections. Meanwhile, Lucius Vorenus refuses to allow some thugs to harm a citizen in debt, which causes him trouble in his job as the thugs he threatened worked for the biggest crime boss in Rome. Titus Pullo also is hired as a military tutor for Octavian, though he discovers that Octavian isn't as helpless as he seems to be.

Caesar is in the middle of a fight with Pompey's forces when he realizes that he's become severely outnumbered. He sends a request to Mark Antony in hopes of having him come with reinforcements, though Mark Antony is deciding whether or not he should join Caesar or try to stay as Rome as a ruler himself. Meanwhile, Niobe discovers that the man she loved while Vorenus was gone has recently been cuddled, though such turns out to be the catalyst for her renewed love for her husband.

Lucius Vorenus and Titus Pullo are lost at sea after their legion's ship was destroyed on their way to help Julius Caesar's army, though they have a chance encounter with someone they know. Meanwhile, Pompey decides to send order a full assault on Julius Caesar's camp in an attempt to destroy him once and for all, though the battle goes rather unexpectedly. Back in Rome, Atia is attempting to win the favor of Servilla as she believes Caesar will lose and she needs protection from a supporter of Pompey.

Julius Caesar has chased Pompey to Egypt in hopes of capturing him once and for all, though he discovers that King Ptolemy XIII has done something unspeakable to his former friend. Meanwhile, Lucius Vorenus and Titus Pullo are assigned with the task of finding Ptolemy's sister, Cleopatra, as Julius Caesar has plans with her. However, when Lucius Vorenus gets a strange request from Cleopatra, he must contemplate defying his duty in order to remain loyal to his wife.

Julius Caesar and his legions have finally defeated all the traitors of the Republic and he heads back to Rome where he receives a glorious welcome. Meanwhile, Lucius Vorenus and Titus Pullo get into an argument with a local crime boss who isn't happy with the way Vorenus had previously treated his men.

When Julius Caesar is formally proclaimed Dictator by the Senate of Rome, he declares that the war is over and that Rome celebrates his triumph through five days of feasts and games. Titus Pullo contemplates taking Eirene as his wife in hopes of settling down and living a nice life, while Lucius Vorenus runs for municipal magistrate with Posca's help. Meanwhile, Octavian tries to convince his sister to return home, while Servilla attempts to gather enemies of Caesar in hopes of convincing them to tack action against him.

Lucius Vorenus is asked by Caesar to convince a veteran soldier to personally accept a large severance in exchange for agreeing to make the rest of the veterans calm down. Meanwhile, Titus Pullo cuddles a famous critic of Julius Caesar and he is sentenced to passing in the arena when his lawyer fails to defend him properly. Octavian attempts to persuade Caesar to pardon Pullo for his crimes, though when his requests are ignored, Titus Pullo's fate seems inevitable.

Due to their heroic feats in the arena, Titus Pullo and Lucius Vorenus are praised as heroes throughout the entire city. Despite Julius Caesar's desire to punish them for their actions, their fame and reputation causes him to think otherwise, so he formulates a plan to ensure his own safety while rewarding Lucius Vorenus. Meanwhile, Titus Pullo attempts to ask Eirene to forgive him, as he plans to start a family with her, while Brutus and the rest of his cohorts put into motion their plan to assassinate Gaius Julius Caesar.