Riri Williams has reverse engineered Tony Stark's Iron Man suit and calls herself IronHeart. When she discovers War Machine's plan to forcibly take control of Stark Industries from Pepper Potts, she rushes to aid Pepper and stop War Machine. The trailer shows scenes of Tony Stark's grave, Riri working on her suit in a garage, Pepper talking to someone at Stark Industries, Riri finding a box with an Iron Man USB, and an explosion with a mysterious figure walking away as the credits roll.