Clint Eastwood's score to "Mystic River" is a first rate accomplishment and music that stands alone without the film. It's main theme, a mournful dirge that repeats itself in different variations throughout the film, seems repetitious at first. But as the story unfolds that main theme becomes a powerful reminder of past sins and regrets for several characters in Brian Helgeland's screenplay adaptation of Denis Lehane's novel. Eastwood's film misses being great by a wide margin but it is an ambitious effort that features some spectacular acting. The music score contributes immeasurably to the sometimes implausible drama.