In 1977, Claire Lake 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. In 2017, Shea Collins runs a true crime website, a passion fuelled by the attempted abduction she escaped as a child. When she meets Beth by chance, Shea asks her for an interview. To Shea's surprise, Beth says yes. The allure of learning the truth about the case from the smart, charming Beth is too much to resist, but even as they grow closer, Shea senses something isn't right.