Several months after the events of Avengers: Age of Ultron, well-meaning thief Scott Lang is released from prison. He rejoins his old cellmate, Luis, who tries to recruit Lang into his gang for a burglary, but Lang wants to live an honest life. Armed with the astonishing ability to shrink in scale but increase in strength, con-man Scott Lang must embrace his inner-hero and help his mentor, Dr. Hank Pym, protect the secret behind his spectacular Ant-Man suit from a new generation of towering threats. Against seemingly insurmountable obstacles, Pym and Lang must plan and pull off a heist that will save the world..