Phillip Calvert is a British Treasury secret service agent assigned to stop the ruthless pirating of millions in gold bullion off the western coast of the Scottish highlands. His search takes him to the small port town of Torbay on the Isle of Torbay where numerous fishing boats, yachts and people have been mysteriously disappearing. A trail of deceit and subterfuge leads him to Cypriot tycoon and shipping magnate Sir Anthony Skouras and his beautiful wife, Charlotte aboard their luxury yacht anchored off the coast, who may hold the answers to the truth.

Anthony Hopkins
as Philip Calvert

Robert Morley
as Uncle Arthur

Nathalie Delon
as Charlotte

Jack Hawkins
as Sir Anthony Skouras

Corin Redgrave
as Hunslett

Derek Bond
as Lord Charnley

Ferdy Mayne
as Lavorski

Maurice Roëves
as Lt. Williams - Helicopter Pilot

Leon Collins
as Tim Hutchinson

Wendy Allnutt
as Sue Kirkside
CinemaSerf
Alistair Maclean always could pen a good a crime thriller, and his adaptation of his own novel lends much to this, otherwise, rather lacklustre production. It stars Anthony Hopkins as an agent who is despatched by Robert Morley ("Sir Arthur") to investigate the loss of a ship off the Northern coast ...