In the aftermath of Age of Ultron, global governments enact a law to regulate superhuman activity, forcing the Avengers to take sides. The controversial act creates a deep rift within the team, with Tony Stark supporting government oversight while Steve Rogers fights to preserve heroes' autonomy. As tensions rise, former allies turn into adversaries, leading to an explosive showdown that threatens to tear the Avengers apart. With friendships shattered and loyalties tested, the battle between Iron Man and Captain America will change the superhero landscape forever.