True Grit , action / adventure , western movie. The story is about the 4 year old Mattie Ross's father has been shot in cold blood by the coward Tom Chaney , and for that she is determined to bring him to justice. Enlisting the help of a trigger-happy, drunken U.S. Marshal, Rooster Cogburn , she sets out with him -- over his obejctions -- to hunt down Chaney. Her father's blood demands that she pursue the criminal into Indian territory.