Forty years ago Juliet Chilworth, the heiress of a prominent family, went missing. With the discovery of her body in a shallow grave, there remains a glimmer of hope of still finding the killer. Detective Mercer Tanwell from the Temporal Investigation Unit is assigned the case, but even with his unique skills, the case might be too cold. Teaming up with a partner he doesn't want, and a task spanning light years, he must reach back through time and space to find the truth.