The Moon-Spinners (1964)

Young English girl Nikky and her aunt arrive at the Moon-Spinners, a hotel on Crete, to a less than enthusiastic welcome. The coolness of the owner is only out-done by the surliness of her brother Stratos, recently back from London. But then there is nice English lad Mark to make friends with, at least until Stratos and his pal take a shot at him one night. When Nikky helps him hide she finds the Greeks are after her too.