After his career is destroyed, a brilliant but arrogant surgeon gets a new lease on life when a sorcerer takes him under her wing and trains him to defend the world against evil.

Armed with the astonishing ability to shrink in scale but increase in strength, master thief Scott Lang must embrace his inner-hero and help his mentor, Doctor 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.