Lagertha and Athelstan help to set up the Viking settlement. A mysterious wanderer arrives in Kattegat.

There is bitterness in the camp, Floki is angry over the alliance with Ecbert.

Preparations for the Paris raid pick up speed, and Rollo thinks about the Seer's prophecy.

The Viking army sets out and Paris goes into lockdown as the army prepares the defense.

With one last chance to take Paris, Ragnar, and his Vikings troops take a daring chance. Ragnar asks Bjorn for a favor that could change the course of Viking history.