A quirky, but happily in love young Italian couple fall in with an older, but distinctly reserved Swedish couple whilst on vacation on islands off the coast of Southern Italy. Eventually the couples seem to warm to each other as the infectious youths bring the standoffish couple out of their shells. But there is a sinister reason for the Swedish couple's cold behavior and it may spell doom for them all.
Giuliano Gemma
as Giulio
Bibi Andersson
as Margit Lindmark
Gunnar Björnstrand
as Prof. Gunnar Lindmark
Rosemary Dexter
as Laetitia
Amos Davoli
as Judge
Arturo Pallandino
as Carabiniere
Elisabetta Bonino
as Violante
Brizio Montinaro
as Barista
Saverio Moriones
as Monaco
Paola Natale
as Maid
Antonella Squadrito
as Biondella
