In the aftermath of the Avengers' disbandment, a group of reformed antiheroes including Yelena Belova, Bucky Barnes, and Red Guardian are assembled by CIA director Valentina Allegra de Fontaine for a covert mission. Trapped in a deadly scenario in New York, they must confront their pasts and work together to survive. The film delves into themes of redemption, trauma, and the complexities of heroism, culminating in a revelation that redefines their roles in the Marvel Cinematic Universe.