Just when his time under house arrest is about to end, Scott Lang once again puts his freedom at risk to help Hope van Dyne and Dr. Hank Pym dive into the quantum realm and try to accomplish, against time and any chance of success, a very dangerous rescue mission.

Ethan Hunt and team continue their search for the terrifying AI known as the Entity — which has infiltrated intelligence networks all over the globe — with the world's governments and a mysterious ghost from Hunt's past on their trail. Joined by new allies and armed with the means to shut the Entity down for good, Hunt is in a race against time to prevent the world as we know it from changing forever.