“Avengers: Endgame” serves as the culmination of the Marvel Cinematic Universe’s “Infinity Saga,” picking up after Thanos’s devastating snap that wiped out half of all life. Â The remaining Avengers, grappling with loss and despair, embark on a risky “time heist” to collect the Infinity Stones from the past, hoping to reverse Thanos’s actions and restore their fallen comrades. Â Facing formidable challenges and emotional sacrifices, they confront Thanos in a final, epic battle that determines the fate of the universe.