Following the events after the battle against Thanos, Sam Wilson, also known as the Falcon, is grappling with the legacy of being handed Captain America's shield and the weight that comes with it. Despite his reluctance to adopt the mantle, Sam continues his missions with the U.S. Air Force while balancing his personal obligations back home. Meanwhile, Bucky Barnes, the Winter Soldier, tries reintegrating into society and confronting his dark past as he attends therapy sessions. Both men find themselves pulled back into action when a new terrorist group, the Flag Smashers, emerges with enhanced individuals threatening global stability. These adversaries challenge the symbol of peace and the new geopolitical order, requiring Sam and Bucky to join forces in a world that's far from simple.

Their journey is complicated by the unexpected appearance of John Walker, a decorated soldier appointed as the new public face of Captain America. As Sam and Bucky navigate their partnership, they confront widespread political tensions and underscore what it truly means to wield the shield. The duo's reluctant partnership unfolds across various continents, meeting old allies and new adversaries while questioning their own identities. As they strive to stop the Flag Smashers' dangerous plans, revelations about espionage and hidden agendas force them to confront what they truly value. Their mission becomes more critical as they realize that not only are lives on the line but also the mantle of Captain America itself hangs in the balance, setting them off on a journey where action and introspection collide with potent force.