To prevent further bloodshed and secure land for his people, Ubbe engages in a brutal hand-to-hand duel with King Frodo.

A weary Lagertha, found and nursed back to health by a Saxon healer, witnesses this triumph and tearfully tells Ragnar's ghost that his dream is fulfilled. Storm Clouds Over Kattegat In Scandinavia, the stage is set for a massive civil war.

In Kattegat, Ivar the Boneless (Alex Høgh Andersen) faces a domestic rebellion. After discovering his son Baldur was not his, he leaves the infant to die and nearly chokes his wife, Freydis, in a fit of rage.

Bjorn Ironside and King Harald overcome their personal rivalries to join forces with Hvitserk and King Olaf.

The episode’s title refers to the journey of the fanatical boatbuilder (Gustaf Skarsgård) into the depths of an Icelandic volcano. Believing he has finally found the gates to Hel or a realm of the Norse gods, Floki instead discovers a Christian cross and a chalice.

The discovery is devastating: the "Land of the Gods" he sacrificed everything for was reached by his hated Christian enemies long before him. His laughter turns to screams of despair, triggering a cave-in that leaves his ultimate fate uncertain as the volcano erupts. The True Heir of Ragnar