Cherusci tribal chief Segimer bristles at the increasing demands of new governor Varus. Secret lovers Thusnelda and Folkwin deal Rome a symbolic blow.

Ari embraces his new role with the Cherusci but his shift of allegiances runs deeper than Varus knows. Thusnelda and Folkwin rally a rival tribe.

Ari leads Varus and three Roman legions into the Teutoburg Forest — and into history. Thusnelda makes a bloody sacrifice to preserve the alliance.

The theft of the standard provokes a crisis, reuniting Roman officer Ari with his father Segimer, and childhood friends Folkwin and Thusnelda.

Ari and Thusnelda forge a political marriage and begin uniting the fractious Germanic tribes. Folkwin is believed dead but has actually been enslaved.

Ari suspects the Romans of rebuilding their forces, so he seeks the help of an eastern tribal chief, Marbod. Ari’s brother, Flavus, arrives in Germania.

Tiberius requires a test of Marbod's loyalty. Flavus proposes an offer to Germanicus. The tribal chiefs gather to name Marbod king but tragedy strikes.

Marbod confronts Tiberius and demands justice. Thusnelda and Folkwin set out on a mission. Gaius hides out in the forest and makes a shocking discovery.

Germanicus accuses Flavus of being a traitor. Ari brings Gaius to the village and then seeks revenge against Marbod. Thusnelda is angry at Ari for lying.

The tribes prepare to attack the Roman camp before ships with reinforcements arrive. Segestes approaches Tiberius with a treacherous proposal.

A friend comes to Thusnelda’s aid when she infiltrates the Roman camp. Without Ari knowing, Marbod meets with Tiberius in a bid to secure peace.

Ari commands troops ordered by Varus to hunt down and kill Folkwin, whose family and home village are put in danger for his act of defiance.