Olaf lands in a terrible position after Forkbeard invades Kattegat. In hiding, Freydis and Harald must decide whether to fight for the throne or flee.

Freydis finds a new home. Harald formulates a daring new plan to take back Norway, but Leif's not on board. A new threat appears in London.

Harald makes a risky move and falls into the hands of the Pechenegs. Olaf sets out to find Jomsborg and stumbles upon an unlikely source of help.

While preparing for a journey to Constantinople, Harald assembles an unlikely crew, each with their own motives. Emma suspects Godwin of treachery.

The travelers make a deadly miscalculation on the way to Constantinople. Olaf sets off after Harald, and Emma's paranoia pushes her over the edge.

Love blossoms on the ship as the crew makes a fateful decision, with Olaf hot on Harald's heels. Jormundr stands trial. Canute makes Godwin an offer.

Leif says a painful goodbye. Harald's new love is not what she seems. A key battle comes to an end, but the war to rule over Norway is just beginning.

Harald learns a devastating secret. The group encounters a dangerous stranger. Harekr reveals his true intentions for the future to Freydis in Jomsborg.