When former Missouri Governor Lilburn Boggs is shot by an unknown assailant, rumors quickly spread that the Mormons are responsible for the attempted assassination of the controversial politician. Never a friend of the members of The Church of Jesus Christ of Latter-day Saints, Boggs had four years earlier issued the infamous extermination order that pronounced, "Mormons must be treated as enemies, and must be exterminated or driven from the State."
Rumors gain new momentum when recently excommunicated member John C. Bennett implicates the Prophet Joseph Smith and Porter Rockwell in the crime. Though these accusations are vehemently denied by Joseph and his supporters, arrest warrants are issued for the Prophet and his protector. Joseph's warrant is dismissed; however, Porter Rockwell, not yet thirty, is arrested. After spending nine months in jail, Porter is finally brought to court for a grand—jury hearing to determine if there is sufficient evidence to indict him—a hurdle the state of Missouri must clear to proceed with a full criminal trial. This taut courtroom drama brings to life the friendship of Joseph and Porter and the original story behind the larger-than-life, legendary Porter Rockwell.