In 1977, Claire Lake, Oregon, was shaken by the Lady Killer Murders: Two men, seemingly randomly, were murdered with the same gun, with strange notes left behind. Beth Greer was the perfect suspect, but she was acquitted. Oregon, 2017: Shea Collins is a receptionist, but by night, she runs a true crime website, the Book of Cold Cases. When she meets Beth by chance, Shea asks her for an interview.