Three couples are involved in a murder at Montecarlo.
as Alberto Franzetti
as Remo
as Quirino
as Eleonora Franzetti
as Giovanna
as Eleonora's Lover
as Commissario Polizia
as Marina
as Carolina
as Giambattista
as Francesco
as Mario
as Caterina, la cameriera della villa
as Fiorenzo, il proprietario del salone da barbiere
