Under the watchful eye of DCS James Langton, DCI Anna Travis takes charge of an investigation for the first time. But is it purely a missing person's case - or a full blown murder enquiry? An ominous pool of blood and no victim lead Anna on a desperate hunt for a man who has disappeared without trace. As Anna becomes obsessed with seemingly irrelevant details, Langton fears that she is losing control. They still have no body and Anna is under increasing pressure to make an arrest.