 Mac an Athar is the story of Seán, a 12 year-old boy raised in the Irish language on Dublin s Northside, who encounters ridicule for his "unorthodox" upbringing. He has not spoken a word of Irish to his father, Tomás, since the sudden death of his mother some months back. But as Seán begins to see the toll her death has taken on his father, a transformation begins...