Jimmy Logan, a detective, tries to retrieve a diamond from the British crown stolen by the traitorous chief of the English Secret Service. After carrying out dangerous investigations at Montecarlo, Beirut and Hamburg, he discovers that the headquarters of the thieves is located in a mental hospital and sets about infiltrating their ranks.

Genres

Cast

Ray Danton

Jimmy Logan

Agnès Spaak

Arianne

Luciana Gilli

Desireé

Pamela Tudor

Gladis

Daniele Vargas

Dolmann

Francesco Mulè

Gran Capo

Seyna Seyn

Lulu Mao

Andrea Aureli

Schwarz

Fortunato Arena

Brett

Mirella Pamphili

Hostess

Carlo Pisacane

Guardiano Stazione

Pietro Tordi

Vecchio Pazzo