Ragnar goes on a trip of initiation with his son. Meanwhile, he thinks he has finally found a way to sail ships to the west. However, his beliefs are seen as insane so he chooses to go against the law.

The stage is set for the first journey west by Ragnar Lothbrok as he gathers a crew willing to risk their lives to travel into the unknown.

The Vikings head back to England to see what other treasures this new world has to offer. This go round Ragnar and his crew sail out with Earl Haraldson's permission.

In the Great Hall of Kattegat, a seer reads Earl Haraldson's future and tells him that Ragnar Lothbrok searches for his death.

Ragnar, weak and still hurt, must meet the Earl head-on after it comes to light that Rollo has been tortured on Haraldson's orders.

Three Viking ships sail upriver towards the very heart of power in eastern England: the Royal Villa of King Aelle.

The traditional pilgrimage to Uppsala to thank the gods brings a torrent of emotions for Ragnar, Lagertha, and Athelstan.