Spartacus realizes that becoming the leader of a mass of freed slaves can be challenging and he struggles to keep the rebellious group intact when news of Claudius Glaber's arrival in Capua reaches him.

Spartacus and his men liberate a Roman villa, but its slaves are wary. Oenomaus throws himself into the brutal Pits, and Glaber supports Lucretia’s prophecies, despite Ilithyia’s protests.

Spartacus is forced to mediate when the gladiators are close to divide into groups after news of Naevia's fate reaches them. Lucretia exchanges a long-held secret for some information and an attack puts the rebels at risk.

Spartacus seeks the safety of the woods for his surviving men while Crixus finds himself revisiting past horrors. Meanwhile, Lucretia spies Ilithyia's affairs.

In an ironic twist of fate, a gladiator from the house of Batiatus will stand in the way of Spartacus trying to free Crixus from Roman captivity. Ilithyia's scheming puts her marriage to Glaber at risk.

Spartacus and his rebels train hard to keep their new sanctuary safe while Glaber's forces are made stronger with the enlistment of some new deadly recruits. Lucretia and Ilithyia become close again.

While Spartacus finds an opportunity to get revenge, Glaber is surrounded by intrigue.

Spartacus has to once again use his leadership skills to convince his band of rebels to unite against the Roman assault. Lucretia struggles to get rid of those men standing in the way of her fate.

When a shortage in supplies has the rebellion about to fail, Spartacus tries his best to give his men hope.