Hazlehurst housing estate, Glasgow, Christmas Eve 2006. 15-year-old Marnie and her little sister Nelly have just finished burying their parents in the back garden. Only Marnie and Nelly know how they got there.Lennie, the old guy next door, has taken a sudden interest in his two young neighbours and is keeping a close eye on them. He soon realises that the girls are all alone, and need his help - or does he need theirs?