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.

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

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.

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.

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 and Leif help Romanos lay siege at Syracuse. Canute travels to Rome to meet with the Pope. A new arrival in Jomsborg catches Freydis' eye.

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

As the Byzantine army returns to Constantinople, Leif agonizes over the Syracuse horror. Magnus sails to Jomsborg as Freydis' people begin to heal.

Leif meets an unusual nun on his way to Corfu, Freydis devises a plan for Magnus' imminent arrival and Harald's indiscretion worries his friends.

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