It had all started when an elegant businessman named Canisius came to Van der Valk to ask him to do some undercover detecting—to find out about the millionaire Jean-Claude Marschal, who had disappeared. There was no foul play suspected. Apparently, Marschal had suddenly decided to vanish from his job, leaving his luxurious home, his self-indulgent way of life and his devoted, very attractive, if rather reserved, aristocratic Belgian wife.
Trying to find some trace, Van der Valk sought the help of an old friend, a policeman, in Cologne. The …