Gru, Lucy, Margo, Edith, and Agnes welcome a new member to the family, Gru Jr., who is intent on tormenting his dad. Gru faces a new nemesis in Maxime Le Mal and his girlfriend Valentina, and the family is forced to go on the run.
As storm season intensifies, Kate, Tyler and their competing teams find themselves in a fight for their lives as multiple systems converge over central Oklahoma.