Freydis returns to Kattegat and joins a sacred order. Canute solidifies his power in England. Kåre revisits the holy site of a childhood trauma.

Olaf makes a pact with Kåre as Kattegat prepares for its defense. In Canute's absence, his father, Sweyn Forkbeard, shares England's throne with Edmund.

Olaf and Kåre gather their forces to invade Kattegat. Palace intrigue over control of England's throne results in an unexpected turn of events.

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.

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.

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 fights the Emir for control of Syracuse. Something causes the Jomsborg townsfolk to fall ill. Magnus Olafsson unexpectedly arrives in Kattegat.

Harald sacrifices everything to protect his friends, Canute gathers his sons in Kattegat and Erik tries to convince Freydis to stay in Greenland.

Freydis confronts Erik over his schemes to make her stay, Canute declares a successor and Harald devises an escape plan.

Emma prepares to defend the throne. Magnus and Harald vie to be King of Norway. Unbeknownst to each other, Leif and Freydis both return to Kattegat.