The movie picks up where Ant-Man (Paul Rudd) and the Wasp (Evangeline Lilly) left off, exploring the mysteries of the quantum realm. The story follows Scott Lang, aka Ant-Man, as he navigates his life after being stuck in the quantum realm for years. He is reunited with Hope van Dyne, aka the Wasp, and her family, including her parents, Hank Pym (Michael Douglas) and Janet van Dyne (Michelle Pfeiffer).