The story itself will be adapted from a popular Marvel Comics storyline, though obviously re-told through an MCU lens acknowledging the changes in the show’s universe.
The original story detailed Stark searching for answers as his armor’s designs fell into the wrong hands.
As far as what all Armor Wars will explore, there’s still a laundry list of questions MCU fans have about the time after The Blip that haven’t been touched on yet.
While we don’t know how much of that will be covered in the series, Don Cheadle has confirmed that Tony Stark’s death will factor into the series (via Brobible.com).