Blow Hot, Blow Cold (Italian: Violenza al sole, also known as The Island) is a 1969 Italian thriller-drama film directed by Florestano Vancini.

[1][2][3] A complex love story in the setting of a summer holiday in the beautiful islands off the coast of Puglia (Italy).

Here we find two couples: an irregular but happy Italian pair of youths, and the other Swedish, more mature and legal.

Gunnar Lindmark is a professor of psychology, while his wife Meret finds here a reminiscence of an old extramarital love, which ceased because of her lover's death.

This crisis triggers jealousy in the professor, who kills the Italian guy.