December 23, 1981, is supposed to be a happy day for Roxann Jeeves and her son, Kristopher. It's the boy's fifth birthday and they have plans to tour a candy factory. Instead, the day ends in unthinkable tragedy. Mother and son are brutally murdered together in a field outside Dallas, Texas. Their killer flees the scene and the investigation ultimately goes cold, but the killer leaves evidence that leads Detective Larry Forsyth on an epic 20-year hunt.