Brooke calls it quits with her boyfriend Gary. Neither one is willing to move out of the condo they once shared. Taking the advice of their respective friends and confidants, including a few complete strangers, they both engage in mental warfare designed to force the other person to flee the premises. But they might just realize that they might be fighting to keep their relationship alive.

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, 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.