Six years after her family of ten children had assembled in her home for a party, Sheila Malone has to endure another reunion weekend with all but two of her children. The occasion this time is a wedding and she is even less happy about this celebration than she had been for the party for her fourth eldest daughter. Sheila tries to manipulate her children just as she has always done but this time, instead of dividing and controlling them, she is defeated and they grow close. They ignore their mammy's sulky moods so that their youngest sister can have a happy day. Shortly before the family sets out for the church, one of Sheila's daughters finds a letter that explains some of the reasons why her mammy's behaviour is so nasty and difficult. The letter leads to a family conference on the Sunday afternoon. The contents of the letter need to be sorted out, and decisions must be made on how they can help their youngest sister live on her own with their mammy.