In 1924 the Boundary Commission is tasked with creating the new official division between Northern Ireland and the Irish Republic. Through incompetence, dereliction of duty and sheer perversity, the border ends up running through the middle of the small town of Puckoon. Houses are divided from outhouses, husbands separated from wives, bars are cut off from their patrons, churches sundered from graveyards. And in the middle of it all is poor Dan Milligan, our feckless protagonist, who is taunted and manipulated by everyone (including the sadistic author) to try and make some sense of this mess...