Hidden plot
Inspector Cadi John returns to her hometown in North Wales after many years to be closer to her terminally ill father. Soon after her transfer, she has to get to work. The body of a young woman has been found in a river in Snowdonia National Park. Did she commit suicide or was she murdered? Cadi investigates the case with her new partner Owen Vaughan. The trail leads to Mali Pryce, a girl who has been missing since 2011. The investigation seems to indicate that she was then kidnapped and spent the entire time in captivity before she died.