The Pledge

Director Sean Penn's third film features Jack Nicholson as Jerry Black, a retired detective whose final case ultimately causes his slow descent into madness. In the midst of his retirement party, Black decides to join Detective Stan Krolak (Aaron Eckhart) on one last case. The molested body of an eight-year-old girl is found in the Nevada Mountains. When the chief suspect turns out to be a mentally challenged Native American (Benicio Del Toro), Black is not convinced of his guilt despite his confession. Unable to forget the promise he made to the dead girl's mother that he would find her daughter's killer, Black becomes determined to catch a monster that no one else believes is out there. His resolve increases when he realizes that two similar unsolved murders occurred in the same area in recent years, and the case hits closer to home when Black befriends Lori (Robin Wright Penn), a waitress with a threatening ex-husband, and her eight-year old daughter, Chrissy (Pauline Roberts). (official distributor synopsis)