Scott Lang, following his house arrest due to his actions with the Avengers and the Sokovia Accords, becomes a key figure in an extraordinary discovery. Hank Pym and Hope van Dyne, driven by the hope of rescuing Janet van Dyne from the Quantum Realm where she has been trapped since 1987, successfully open a brief connection to this mysterious dimension. During this process, it is revealed that Lang, during his prior journey to the Quantum Realm, became quantumly entangled with Janet. This connection leads him to receive what appears to be a message from her, suggesting that she may still be alive and reachable. This development sets the stage for potential advancements in their efforts to bring Janet back.