Ant-Man begins in 1989 as genius inventor and industrialist Hank Pym achieves a major success in a revolutionary shrinking technology that can reduce a man to the size of an ant while increasing his strength a hundredfold or more. But he hides his accomplishment and resigns from his company to keep the development from falling into the wrong hands. As we jump to the present, his protégé, Darren Cross, is now the head of the company and close to the success that Pym secretly achieved in 1989.