There is bickering aplenty in the Brown household, as Rory and Dino are on the rocks and Agnes and Betty rub each other up the wrong way. With Maria about to give birth, Cathy convinces Agnes to build bridges and invite Maria's mother Hillary out for dinner. However, the night comes to an abrupt end when Maria goes into labour. Can the family get Maria to the hospital in time?

Agnes Brown has finally been given permission to stage her own Nativity play and is determined to put on the greatest show on Earth. The only thing standing in her way now is local priest Father Damien, who is insisting that Agnes makes some last-minute changes to her rather unusual script. Will Agnes ever get to play the Virgin Mary?