The battle begins between Ragnar and King Horik’s forces against Jarl Borg; Princess Aslaug makes her way to Kattegat.
Floki learns of the heavy price he has paid for his actions. Rollo finds an unlikely ally in Count Odo. Bjorn has to fight a fierce opponent in the wilderness.
Ragnar declares another raid on Paris at the Thing in Kattegat. Ecbert also has a journey in mind as he dispatches Aethelwulf and Alfred on a pilgrimage to Rome.
Ragnar and Ivar plot against the Saxons and reach a new level of understanding.