FBI AGENT MALCOLM TURNER AGAIN GOES DEEP, DEEP UNDERCOVER ASTHE CORPULENT SEPTAGENARIAN BIG MOMMA. TO AVERT A NATIONALSECURITY DISASTER, BIG MOMMA BECOMES A NANNY HOUSEKEEPER IN THESUSPECTS HOUSEHOLD - ONLY TO FIND HIM/HERSELF BECOMINGATTACHED TO THE THREE CHILDREN OF THE DYSFUNCTIONAL CLAN.