On her first day as a newly minted homicide detective, Sarah 'Salt' Alt is given the cold case murder of a blues musician whose death was ruled an accidental drug overdose. Now, new evidence has come to light that he may have been given an overdose intentionally. This evidence came from a convicted felon hoping to trade his knowledge for shortened prison time. A man who Salt herself put behind bars. In a search that will take her into the depths of Atlanta's buried wounds, Salt probes her way toward the truth in a case that has more at stake than she ever could have imagined.