Martin Fallon, an Irish Republican Army (IRA) member, becomes disillusioned with the violent tactics of his group after a bomb he plants unintentionally kills a busload of schoolchildren. Seeking to escape the cycle of violence, Fallon flees to London, hoping to start anew. However, his past continues to haunt him as his former associates and local gangsters press him for one last job. Fallon struggles with his desire to leave the life of crime while facing threats from those who want to exploit his deadly skills.

As Fallon tries to find redemption, he crosses paths with Father Da Costa, a compassionate priest who provides him with a temporary safe haven. Da Costa becomes a reluctant confidant and moral compass for Fallon, challenging him to seek forgiveness and change his ways. Meanwhile, a determined London police officer named Inspector Miller begins to track Fallon, believing he has a crucial role in a complex web of criminal activities. Fallon's journey is fraught with moral dilemmas and intense confrontations as he navigates a treacherous underworld, attempting to break free from his violent past and find peace amidst chaos.