DCI William Wisting, hero of the hit BBC Four series, is back in a case that will take him into the murky world of the dark web in pursuit of a killer
William Wisting is contacted by the leader of an online group dedicated to solving the murder of the Australian backpacker Ruby Thompson. But when one of the members, Astria, claims she's close to solving the mystery, she goes offline, and no one in the group has heard from her since.
Wisting is sent to investigate and soon finds himself in a case where nothing is as it seems . . .
