The mighty slave army, led by Spartacus, has carried all before it, scattering the legions of Rome. Three praetors, two consuls and one proconsul have been defeated. Spartacus seems invincible as he marches towards the Alps and freedom.

But storm clouds are massing on the horizon. Crixus the Gaul defects, taking all his men with him. Crassus, the richest man in Rome, begins to raise a formidable army, tasked specifically with the defeat of Spartacus. And within the slave army itself, there are murmurings of dissent and rebellion.

Spartacus, on the brink of glory, must make a crucial decision - to go forward over the Alps to freedom, or back to face the might of Rome and try to break its stranglehold on power forever.