The 1969 murder of Jacqueline English, who disappeared after working the evening shift at a snack bar, shattered her family. Her killer was never brought to justice, and that continues to haunt Jackie’s now 60-year-old sister, Anne, whose drive to catch Jackie’s killer remains as strong as ever. Anne hands over Jackie’s diary, giving Mike and his squad her blessing to thaw out this cold case. Will the secrets within the pages of her diary contain clues to her death?