A couple on holiday in Haiti become involved in a series of savage murders linked to a doctors a new invention, a drug with extreme side effects.
Anthony Steffen
as Doctor Williams
Anita Strindberg
as Grace Wright
Gabriele Tinti
as Fred Wright
Umberto Raho
as Philip
Stelio Candelli
as Garner
Kathryn Witt
as Robin
Alfio Nicolosi
as Peacock
Gordon Felio
as
Richard Osborne
as
Bob Lemoine
as
Pierre Richard Merceron
as
