Spartacus considers striking a deal with a band of marauders to ensure his people stay supplied and fed. Crassus' son Tiberius makes a bold and fateful decision.
The infiltration of a Roman spy causes tension to mount amongst the rebels. Crassus resurrects an abandoned form of Roman punishment to teach his soldiers a brutal lesson.
As Crassus leads an onslaught against the rebel-occupied city, Gannicus is trapped behind enemy lines. Tiberius is tasked by Crassus to hold a celebration in honour of a man he despises.
Pinned in on a snowbound, impassable ridge, Spartacus and Crixus fight over the method of escape. Crassus discovers it increasingly difficult to control the actions of those closest to him.
Spartacus and the rebels arrive at a crossroads. With the relentless Crassus driving his men hard in the pursuit of Spartacus, the conflict between Tiberius and Caesar escalates.
Crassus learns that a fellow prominent Roman is attempting to steal the glory of defeating Spartacus. Spartacus looks for a bargaining chip he can use against the Romans.