Harris County, Georgia, 1912. A white man, the beloved nephew of the county sheriff, is shot dead on the porch of a black woman. Days later, the sheriff sanctions the lynching of a black woman and three black men, all of them innocent. For Karen Branan, the great-granddaughter of that sheriff, this isn't just history; this is family history. Branan spent nearly twenty years combing through diaries and letters, hunting for clues in libraries and archives throughout the United States to piece together the events and motives that led a group of people to murder four of their fellow citizens in such a brutal public display.