Mississippi, 1964. The murder of three human rights activists raises a wave of riots. It is up to FBI agents Anderson and Ward to find the perpetrators. The wife of a local sheriff's deputy, involved in the investigation of the case, discovers a secret that casts a shadow on the main people in town, making those involved in a bloody conspiracy. But that doesn't stop Anderson, an agent with years of experience. He knows that sometimes the law must be broken to achieve a goal, or the killers will remain at large.