The movie picks up where the previous installment left off, with Scott Lang (Paul Rudd) struggling to balance his life as a superhero and a father to his daughter, Cassie (Kathryn Newton). As he navigates his way through the complexities of being a hero and a family man, Scott is confronted with a new threat in the form of Kang the Conqueror (Jonathan Majors), a powerful and ruthless villain from the future.