After Askeladd kills Thorfinn's father Thors, Thorfinn hides inside Thor's ship and bides his time until the opportunity to take revenge. However, life on the ship is harsh without any food or water, and Thorfinn grows weaker day by day. One day, Thorfinn, armed with his sword, attempt to attack Askeladd in his sleep...

Askeladd withdraws temporarily from the war against England. While searching for a new source of income, he encounters a skirmish among the Franks and hatches a plot to steal their treasure. Askeladd sends 16 years old Thorfinn, who has grown up into a cold-hearted Viking, ahead as a messenger.

Askeladd and his men change course and decide to return to Gainsborough, by crossing through the Earldom of Mercia in the midst of a harsh snowstorm, where the main army of Denmark awaits. The men spot a small village in the blizzard and make their move.

After the assassination attempt on Canute’s life, rumors spread through York saying that the king is trying to kill Canute. As a result, the king is unable to issue any orders that would put Canute in harm, and Askeladd is pleased that everything is proceeding as planned. However, the tables turn when King Sweyn speaks. Meanwhile, Thorfinn is sent to prison as punishment for disturbing the peace.

After everything that happened, Einar asks Thorfinn if he's ever fought in a war — and if he's ever killed a man.

Thorfinn wakes up in a peaceful place and he sees his father again. But then things quickly turn dark, and Thorfinn must face his painful past.

Snake strikes quickly, surprising Thorfinn with his speed and agility. As he lies wounded, Gardar thinks back on the life he shared with Arnheid.

Thorfinn and Einar have said their piece, but Canute stubbornly refuses to give up Ketil's Farm. Then, Thorfinn breaks the standoff with a decision.