At 1.20am on 24 March 1922, five men, four dressed in police uniforms, broke into the north Belfast house of Owen McMahon, a well-known Catholic publican. They gathered the male members of the family, told them to ‘say their prayers' and fatally shot McMahon, four of his sons and Eddie McKinney, an employee of the family. Nobody was ever charged with the murders, and a devastating chain of events had been set in motion.

In retaliation, the IRA assassinated the former head of the British Army, Sir Henry Wilson, and a subsequent British ultimatum to the Irish government sparked the Irish Civil War days later. The reluctance of the unionist Belfast government to pursue loyalist killers drove rifts between Northern Ireland's two main communities even deeper, laying the foundations for the Troubles at the end of the twentieth century.

Over one hundred years later, Edward Burke has uncovered the identity of the McMahons' likely murderer, a First World War veteran who led the most dangerous loyalist gang in Belfast. Ghosts of a Family is a riveting cold-case investigation that invokes the smoke-filled streets of Belfast during the cataclysmic violence of 1920-22, and explores how the ramifications of the McMahon killings are still being felt to this day.