One Under

For a policeman, there are some questions that have to be asked even if no one wants to know the answers. A middle-aged man jumps under a tube train at Shepherd's Bush station. A teenage girl is killed in a hit-and-run, in a country lane puzzlingly far from her home on the White City Estate. These two unrelated incidents occupy DCI Bill Slider and his team during a slack period. At least it's a change of speed after the grind of domestics, burglaries, and Community Liaison. But links to a cold case (another dead teenager, pulled out of the River Thames) create doubts as to whether they are indeed unrelated. And slowly a trail of corruption and betrayal is uncovered, leading Slider and his firm ever deeper into a morass of horror.