With an increasingly unstable Vorenus running the Aventine quarter for Mark Antony, Pullo must fight to rein in his old friend's aggressive stance. Meanwhile, Octavian wins a powerful ally in his fight to destroy Mark Antony.
Octavian and Mark Antony's armies finally come to blows, with Mark Antony suffering heavy losses. Meanwhile, Vorenus receives vital information about the possible whereabouts of his children.
Whilst Octavian prepares for his triumphant return to Rome, Mark Antony plots his resurgence. However, with Atia torn between loyalty to both men, she comes up with a plan to deliver an uncertain truce.
With Mark Antony and Octavian uneasily allied, their old enemies Brutus and Cassius make an unexpected resurgence. Will Brutus finally triumph over his old enemies? Meanwhile, Vorenus fails to notice the dangerous treachery that his eldest daughter has been drawn into.
As Servilia mourns the death of her beloved son, Atia is also devastated by some shocking news. Meanwhile, Pullo's infidelity reaps catastrophic results.