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.
as Jimmy Logan
as Arianne
as Professor Froyd
as Desireé
as Lolita
as Gladis
as Dolmann
as Gran Capo
as Sheila
as Lulu Mao
as Schwarz
as Brett
as Hostess
as Guardiano Stazione
as Vecchio Pazzo
