Picking up where Avengers: Infinity War left off, the surviving members of the Avengers and their allies are reeling from the devastating snap that wiped out half of all life in the universe. Desperate to undo the damage caused by Thanos (Josh Brolin), the team hatches a plan to use the Quantum Realm to travel back in time and gather the Infinity Stones, which they hope to use to restore balance to the universe.