In Episode 16 of Vinland Saga Season 2 titled "Cause" ("Ursache"), the series explores the complex emotions and challenges of the characters as they face critical decisions. It showcases Vinland Saga's talent for telling gripping stories and developing multi-dimensional characters that fans can empathize with.

The episode begins with Thorfinn trying to calm Einar as they search for Arnheid, who reveals that she helped Gardar escape, leading to his severe injury. With Sverkel's help, they have hidden Gardar on the farm while Snake's men keep an eye on Arnheid.

Sverkel advises Snake to abandon his pursuit of revenge against Gardar and instead focus on farming. This highlights the importance of leaving past grievances behind and embracing a more peaceful path.

To help Arnheid and Gardar escape, Einar disguises himself as Gardar to draw the guards' attention, while Thorfinn and Sverkel assist the injured Gardar onto a wagon. However, Snake grows suspicious, returns to the farm, and catches the two in the act.

As tensions rise, Thorfinn confronts Snake in combat, relying solely on his fists to avoid unnecessary violence. His skill and determination surprise the onlookers, including Snake, Sverkel, and Arnheid. The episode ends with Thorfinn in his old fighting stance, ready to face Snake.