Celcius Daly is investigating the abduction of a boy by a group of travellers already under investigation for smuggling and organised crime. As he digs into the child's background, he discovers a family secret linked to an unsolved crime during the Troubles — the disappearance of a young woman and her baby. Daly's investigation shakes loose some harrowing truths about the past treatment of travellers and the present day lawlessness of Northern Ireland's border country.
Undergoing an internal investigation over his handling of the search for IRA spy Daniel Hegarty, Daly realises that he has much in common with the beleaguered and outcast travellers and soon finds himself entangled in a vigilante mission, discovering just how far a group of outsiders will go to find their own justice.
