Sarah Broughton has come a long way to put her dark past behind her a€ as well as her old identity. When Sarah begins receiving letters mysteriously signed with the letter "M," she thinks they're from a harmless admirer, until her real name appears in the third letter. And then she finds that name inscribed in the sand near her home-- next to a body. The message is clear: someone is watching Sarah's every move and their obsession is dangerous. Panicked, Sarah turns to Detective Arvo Hughes, but nothing in Hughes' experience has prepared him for the mastermind he's up against. For the killer, there's no cure for love. And for Sarah and Hughes, there's no way out.