Fifty Dead Men Walking is a thriller film based on the true story of an Irish informant who infiltrated the IRA in the late 1980s. Marty McGartland, a young petty criminal and former member of a loyalist street gang, is recruited by the British police to act as an informant and infiltrate the IRA.
Guided by a Special Forces officer named Fergus, McGartland gradually establishes himself as a trusted member of the IRA, even participating in a number of their terrorist operations. Over time, however, he begins to have doubts about his role and the dangerous game he's playing.
With tensions rising in Belfast as the conflict between the IRA and British forces escalates, McGartland must navigate a dangerous web of double-crosses and betrayals, risking his life at every turn.
Ultimately, Fifty Dead Men Walking is a tense and gripping film that offers a compelling look at the world of espionage and counter-terrorism during the Troubles in Ireland.