Despondent over a painful estrangement from his daughter, trainer Frankie Dunn isn't prepared for boxer Maggie Fitzgerald to enter his life. But Maggie's determined to go pro and to convince Dunn and his cohort to help her.

Nineteen-year-old Danny Flynn is imprisoned for his involvement with the I.R.A. in Belfast. He leaves behind his family and his sixteen-year-old girlfriend, Maggie Hamill. Fourteen years later, Danny is released from prison and returns to his old working class neighborhood to resume his life as a boxer.