A man is chained inside a tunnel and then dismembered and scattered along the tracks by the early morning train from Portsmouth to London. The beginning of DI Joe Faraday's most gruesome case yet, but is it a bizarre suicide or the cruellest of murders? Checking the list of missing persons as the police attempt to identify the body DC Winter comes across a missing man, someone who stepped out of his ordered life with no hint of leaving. He's not the man in the tunnel, he's simply disappeared. The only person he can find who knew him works in the city morgue...ONE UNDER: two crimes, two tangles of emotions and thwarted love, one brilliant microcosm of Britain today.