Following The Events Of Despicable Me 3, Gru, Dru, Lucy, Margo, Edith & Agnes & The Other Minions Go On An Another Mission. They Are Going To Fight Harry Best, Who Has Powers Of Ninja. Unfortunately, Lucy, Gru & Dru Meet Their Lost Relatives: Lucy's Sister, Helen Wilde, & Gru & Dru's Grandfather & Marlena's Father, Dan Gru. They Must Defeat Harry Best To Save The World.