The novel follows the tenacious quest of a young girl named Mattie Ross, who is determined to avenge her father's murder. She hires a tough, aging U.S. Marshal with a reputation for getting the job done, despite his penchant for drinking and his rough-and-tumble demeanor. Together with a Texas Ranger, they set out into the treacherous Indian Territory to track down the killer. Throughout their journey, the unlikely trio faces various obstacles and dangers, but the young girl's unwavering resolve and the marshal's true grit lead them to confrontations with outlaws and ultimately, to justice.