In the wake of a painful estrangement from his daughter, boxing trainer Frankie Dunn has been unwilling to let himself get close to anyone for a very long time, then Maggie Fitzgerald walks into his gym. In a life of constant struggle, Maggie's gotten herself this far on raw talent, unshakable focus and a tremendous force of will. But more than anything, she wants someone to believe in her. The last thing Frankie needs is that kind of responsibility, let alone that kind of risk, but won over by Maggie's sheer determination, he begrudgingly agrees to take her on. In turns exasperating and inspiring each other, the two come to discover that they share a common spirit that transcends the pain and loss of their pasts, and they find in each other a sense of family they lost long ago. Yet, they both face a battle that will demand more heart and courage than any they've ever known.
A sleep-deprived detective tries to track down the murderer of a teenage girl, but in the course of the investigation accidentally shoots and kills his own partner. The killer then blackmails him to frame someone innocent for the murder.
