The long-denied Military Reaction Force (MRF) was tasked with seeking out and shooting IRA gunmen. Gillespie, the unit's commander, gives a vivid account of the frantic nature of the unit's undercover work, records their drinking and dark humour, and conveys the incredible tension of under-cover missions in enemy territory. Assisted by IRA men who had been 'turned' by the unit and disguised as a press photographer, Gillespie and his team would spend their time seeking their targets deep in enemy territory.