AllMovie

Industrial espionage becomes a deadly game when Peter Thal (played by Charles Gray, aka "The Criminologist" in The Rocky Horror Picture Show) murders Professor Harper (Robert Raglan) and steals valuable scientific documents. With the blessing of the British Secret Service, Harper's colleague Peter Brady, also known as "The Invisible Man", trails Thal to Amsterdam. Upon arrival, Brady must not only recover the documents, but also prove that Jenny Reyden (Sarah Lawson), a British undercover agent, did not murder Thal in cold blood.