MI5 come up against the Chala Cartel, Colombia's biggest drug traffickers, when eight customs and excise officers are murdered. Surveillance reveals a link between the cartel and one of Britain's leading oil companies, and Tom and his team are tasked with exposing the corruption.
Cleopatra arrives in Rome; Vorenus is ordered to assume Erastes' captaincy; Octavian infuriates his mother and Mark Antony.
While Octavian prepares for his triumphant return to Rome, Mark Antony plots his resurgence. Atia, torn between loyalty to both men, comes up with a plan to deliver an uncertain truce.
With Antony ensconced with Cleopatra in Egypt, Atia is left bereft. As Rome is left suffering by the devastation of the grain supply, Octavian sends Atia to Egypt to plead with her ex-lover.
As Servilia mourns the death of her beloved son, Atia is also devastated by some shocking news; Pullo's infidelity reaps catastrophic results.