As Gru tries to adjust to being a father to a rebellious teenage son, he also has to navigate the challenges of dealing with Maxime Le Mal, a cunning and ruthless villain who is determined to take down Gru once and for all. Valentina, Maxime's girlfriend, proves to be a formidable adversary as she uses her charm and intelligence to outwit the Gru family at every turn.
Meanwhile, Margo, Edith, and Agnes find themselves caught up in the chaos as they try to protect their new brother and help their parents defeat the new threat. With the help of the Minions, who are as mischievous and loyal as ever, the Gru family embarks on a wild and hilarious adventure that will test their bonds and their ability to overcome any obstacle.
As the stakes get higher and the danger grows more intense, Gru and his family must rely on each other and their unique skills to outsmart Maxime Le Mal and Valentina before it's too late. Can Gru finally prove himself as a worthy father and hero, or will his past come back to haunt him in the most unexpected way?