Bjorn returns to Kattegat to learn that an attack is to take place during the next full moon. Ivar must decide if he can place his trust in a former enemy on the battlefield.
Vikings follows the adventures of Ragnar Lothbrok the greatest hero of his age. The series tells the sagas of Ragnar's band of Viking brothers and his family, as he rises to become King of the Viking tribes. As well as being a fearless warrior, Ragnar embodies the Norse traditions of devotion to the gods, legend has it that he was a direct descendant of Odin, the god of war and warriors.
Tragedy strikes, not only in new territory, but also in England. Ragnar's sons set off in their journeys.
Ubbe and his people must show diplomacy. The Vikings ambush the Saxons. Ingrid makes a play that strengthens her power.
Ubbe arrives in a new territory, but soon realizes that it's already occupied. King Alfred succeeds in assembling his troops.
Ragnar's sons steadily approach Wessex with their army. Alfred abandons his castle and sets out to meet them.
Ubbe and his settlers are at the mercy of the harsh elements out at sea. Ivar and Hvitserk return to Kattegat.