It's Always Sunny in Philadelphia: Season 15

Season overview

Task: Create a JSON object for "It's Always Sunny in Philadelphia" Season 15.
Keys: overview (160-220 words), primer (array of exactly 4 concise bullet points).
Constraints: Use ONLY provided synopsis and sources. No invented facts, titles, names, dates, etc. No markdown, no asterisks, no headings, no bullet points in the text (though primer is an array). Output valid JSON only.
Target Audience: Public reference site (neutral, encyclopedic prose).
TMDB Synopsis: Season 15 gang (Mac, Charlie, Dennis, Dee, Frank) are at a crossroads in a new world following Covid-19 and the events of 2020. Rules are changing quickly. They attempt to continue business as usual despite these changes. They must decide who they will become during the cultural upheaval of 2021.
Source [1]: Four egocentric friends run a neighborhood Irish pub in Philadelphia.
Source [2]: Premiered August 4, 2005. Stars Charlie Day, Howerton, McElhenney, Kaitlin Olson, and Danny DeVito. Day, Howerton, and McElhenney are executive producers.
Source [3], [4], [5]: Ratings/General info (not useful for narrative arc or primer specifics unless needed for context).
Overview:
Must be 160-220 words.
Content: Season 15 follows Mac, Charlie, Dennis, Dee, and Frank as they navigate a changing world in the wake of Covid-19 and the events of 2020. The characters find themselves at a crossroads during the cultural upheaval of 2021. Despite the rapid changes in rules and societal norms, the group makes herculean efforts to maintain their usual way of life and continue business as usual. As they face these shifting circumstances, the gang must ultimately decide who they will become in this new environment. The series, which premiered in 2005, centers on these four egocentric friends who operate a neighborhood Irish pub in Philadelphia.
Word Count Check:
"Season 15 follows Mac, Charlie, Dennis, Dee, and Frank as they navigate a changing world in the wake of Covid-19 and the events of 2020. The characters find themselves at a crossroads during the cultural upheaval of 2021. Despite the rapid changes in rules and societal norms, the group makes herculean efforts to maintain their usual way of life and continue business as usual. As they face these shifting circumstances, the gang must ultimately decide who