Gru and Lucy and their girls—Margo, Edith and Agnes—welcome a new member to the Gru family, Gru Jr., who is intent on tormenting his dad. Gru also faces a new nemesis in Maxime Le Mal and his femme fatale girlfriend Valentina, forcing the family to go on the run.
The Dwarves, Bilbo and Gandalf have successfully escaped the Misty Mountains, and Bilbo has gained the One Ring. They all continue their journey to get their gold back from the Dragon, Smaug.