Pushed into a defensive position by Villains Inc.'s attack on the Dome, the Sentinels seek to learn more about their foe while strengthening their own position. Despite the public backlash against superheroes, which continues to grow, the team continues to carry out its responsibility to serve and protect the citizens of Chicago even though they seem to have become targeted, singly and collectively. When a teammate falls, Astra decides she must find out who they are facing—even if it means dealing with the enemy.