Thomas Lang, a retired captain of the Scottish Guard, is staying in London for some temporary security work. But one day in Amsterdam he was offered a \"real\" job - to kill businessman Alexander Wolf. Rejecting the offer, the former officer decides to warn the businessman about the danger. An unexpected acquaintance with Wolf\'s charming daughter Sarah is just the beginning of a confusing story in which Lang will pose the interest to the British Ministry of Defense and the US CIA...