Puppet on a Chain could be remembered as the film with the speedboat chase. Don Sharp, who was engaged specially to direct this sequence, has in no way spared the boats as the hero relentlessly pursues the villain through the canals of Amsterdam. Regrettably the standard of this sequence is not reflected in the rest of the film.
Sven-Bertil Taube plays a US narcotics agent seeking the headquarters of a drug syndicate in Amsterdam aided by his undercover assistant, Maggie (Barbara Parkins). Wherever they go sudden death is never far behind. The trail leads to a religious order and an island castle.
Alistair MacLean scripted his own story. There is all the action, implausible happenings, violent rough housing and mystery that distinguishes so much of his work, but he has created little sympathy for the characters.