West Belfast, Northern Ireland, 1981. Tensions between Catholics and Protestants have never been higher. The IRA Hunger Strikes are in full swing, and violence continues to spread in Belfast. While working in their parents' grocery store, two young Catholic twins, Vincent and Michael Logan, witness their father's brutal murder by British commandos.

This horrific crime sends the twins on radically opposing paths.

As they reach adulthood, Vincent embarks on a journey for justice and becomes a cop. Michael, still simmering over his father's murder, is out for revenge and soon becomes the IRA's most feared assassin. When Michael discovers that his father's killer has just become the most powerful man in Europe, he plots his revenge. But there's one man standing in his way, one he used to call brother .