In 1974, five black fishermen disappeared off the Florida coast. The authorities said they drowned accidentally, but relatives and civil rights activists always believed otherwise. The case vanished from public view until 2010, when one of the men's daughters met two crusading law professors who were in the midst of an unprecedented effort to grapple with one of the darkest corners of recent American history—a systematic accounting of the untold number of racially motivated, civil rights-related killings that were forgotten by history but could still be investigated. Their list began with one name. Now, it contains hundreds, including the Atlanta Five.