Five years after Dude, Where's My Donkey?, Doru, a child refugee from Syria, is separated from his father as he arrives in the United Kingdom having been smuggled in illegally by boat and under fire. He is moved to Coventry by social worker Suzie Shelly and joins St Bernadette's Primary School, where he meets new teaching assistant Jerry Poppy, who assists him in his search for his father, amid another Christmas musical production for the school, led by impresario Emmanuel Cavendish.[2] Jerry is immediately suspicious that Cavendish and he have met before, believing that his mother used to clean Cavendish's parents' house before Cavendish framed Jerry for stealing a brooch.
With nowhere to stay, Jerry and Doru end up staying with Barnaby, a lonely boy with rich parents who are often away (due to nefarious means by the father). After Jerry helps Barnaby decorate the house, he prompts Barnaby's mother Clara to start making more of an effort to be there for her son emotionally, rather than just providing for him financially. Cavendish's auditions for the show initially go well, but when Cavendish starts trying to take all the major parts for himself, he is fired by the schools so they can do it themselves. Doru’s father goes looking for Doru, and hitches a bus to Coventry.
Cast
Simon Lipkin as Jerry Poppy, the younger brother of Desmond Poppy, the previous teaching assistant from the last three Nativity films.
Craig Revel Horwood as Emmanuel Cavendish, rock legend and Jerry's childhood bully.
Jalisa Andrews as Miss Bailey, the assistant to Mrs. Keen replacing Mrs. Bevan's assistant Miss Rye who appeared in the first Nativity film and Nativity 2: Danger in the Manger.
Gabriel Vick as Hugo Alexander, the new teacher at Oakmoor School replacing Gordon Shakespeare, the previous teacher from the last three Nativity films.
Rupert Turnbull as Barnaby Hargreaves, a student at Oakmoor School and Doru's new friend.