Ruth Evershed finds herself in the middle of an investigation when a man for whom she provided change at a tube station commits suicide by jumping in front of the train. The man, it turns out, was Mik Maudsley at one time the head of security for the prison system and someone who was present at Cotterdam prison, the site of a major fire. The Special Branch report on the incident is due out that same day and it turns out to be a complete whitewash. Ruth is convinced that her meeting Maudsley was intentional and that he has left her a series of clues to follow. Harry Pearce decides to take on Oliver Mace, but he's quite prepared to play hardball and is quite prepared to accuse Ruth of having pushed Maudsley into the train. Written by
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[after Zaf refuses to tell her Ruth's location
It's all right, I don't need to know. I just hope she's well hidden, that's all, because there's going to be a full-scale witch-hunt. Just hope she's got a broomstick.