When the bodies of two teenage girls are discovered on a building site, DCI Whitney Walker knows she's on the hunt for a killer. The problem is the murders happened in 1980 and this is her first case with the new team. What makes it even tougher is that with budgetary restrictions in place, she only has two weeks to solve it.  Once again, she enlists the help of forensic psychologist Dr. Georgina Cavendish, but as she digs deeper into the past, she uncovers hidden truths that hurtle through the decades and into the present.