WATCH: The final Despicable me 3 trailer has arrived

Balthazar Bratt, a former child star obsessed with his 80’s character, steals a precious diamond from under the nose of Gru. Gru, who left his criminal past behind, discovers he has a twin brother, Dru, who convinces him to pull off one last heist. Together, they come up with a plan to steal Bratt’s diamond.