Grace learns exactly what's happening on The Island, all of the questions that she had about The True Way are answered. The murderer is brought to book.
After blowing the whistle on a colleague, Detective Grace Narayan is sent to a small Welsh Island, she encounters local GP Doctor Pridaux, who explains that his son Cai vanished a year ago, the investigation proved fruitless.
An identification is made of the body, Grace is keen to prove it was murder, but a Murder Investigation team arrive from the mainland and take over proceedings.