Vikings: Season 2

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "Vikings" Season 2.
Keys: overview (160-220 word summary), primer (array of exactly 4 concise bullet points).
Constraints: Use ONLY provided synopsis and sources. No invented facts. No markdown/asterisks/headings/bullets in the text (though primer is an array). No markdown in the output (valid JSON only).
Source Material:
[1] TMDB: Season 2 continues the saga across 10 episodes. Ragnar Lothbrok is the hero.
[2] IMDb: Created by Michael Hirst. Stars Katheryn Winnick, Gustaf Skarsgård, Alexander Ludwig, Georgia Hirst. Ragnar Lothbrok is a Viking warrior and farmer who yearns to explore and raid distant shores across the ocean.
[3] TMDB: Ragnar's band of Viking brothers and his family. He rises to become King of the Viking tribes. He is a fearless warrior and embodies Norse traditions of devotion to the gods.
[4] Deadline: Mentions MGM Television oversaw the 2013-20 series.
[5] Wikipedia: Principal cast includes Travis Fimmel as Lodbrok, Katheryn Winnick, Clive Standen, Jessalyn Gilsig, Gustaf Skarsgård, Gabriel Byrne, George Blagden, Donal Logue, Alyssa Sutherland, Linus Roache, and Alexander Ludwig.
Overview: Needs to be 160-220 words.
Wait, looking at the sources provided...
Source [1] says: "Vikings Season 2 continues the overarching saga across 10 episodes."
Source [2] says: "The adventures of Ragnar Lothbrok... Ragnar Lothbrok, a Viking warrior and farmer who yearns to explore--and raid--the distant shores across the ocean."
Source [3] says: "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."
Problem: There is virtually NO specific plot information for Season 2 in the provided text. The text describes the series in general, not the specific narrative arc of Season 2.
The prompt asks for a "factual 160-220 word summary of this season's narrative arc."
If I only use the provided text, I cannot write