In the Irish coastal town of Red Rock, an uneasy truce between two feuding families, the Kielys and the Hennessys, is about to end. Darren Kiely is found unconscious after a beating, and all signs point to Michael Hennessy being the culprit. As old tensions resurface, Hennessy son David and Kiely daughter Katie keep their romance under wraps; and the local police struggle to keep the peace.