Mr. Incredible, Elastigirl, and Frozone use to fight Gru back in the day. Now when Margo and Dash end up in the same class the reunion causes tension in their families. But then an alliance old enemies arrives, Evelyn Deavor, Balthazar Bratt, the Underminer, and a now superpowered Vector calling himself Vector Prime. This united threat forces the families to work together
