Uprooted from city life by the death of his father, Dark is beckoned into a rath as he wanders the fields near his new home. There, he meets people big and small whose magnificent stories of warriors, monsters and the fairy people provide an escape from his crumbling school and home life and take him deep into the world of Fionn Mac Cumhaill and the Fianna.

O'Neill's powerful new tales of adventure, heroism, treachery, weakness and redemption entwine with ancient Irish folklore as Dark realises that he, like his eccentric uncle Connie, belongs to two very different worlds.