With his directorial debut, "Gone Baby Gone," Ben Affleck proves he belongs behind the camera instead of in front of it. Based on Dennis Lehane's novel of the same name, Affleck deftly constructs a gritty look at life on the wrong side of the tracks and how that lifestyle can blur the borders of right and wrong. The story begins after local news stations pounce on the story of Amanda McCready (Madeline O'Brien), a missing 4-year-old girl who lived in a run-down part of Boston with her crack-addicted mother.