Something of a romantic potboiler but strongly redeemed by two factors which stamp it as a thoroughly British rather than a Hollywood production. First, the gritty realism of its portrayal of the Cypriot independence struggle against British military rule in the 1950s. Second, its warts-and-all portrayal of everyday relationships and behaviour, instead of the typical Hollywood sanitized morality of the era.
All you need to know about Cyprus is that the locals ran a successful guerilla war against British rule in the 1950s. Against that background, the movie sets up a tangle of love and conflicting loyalties for a British officer and a beautiful Cypriot-American visitor, which generates plenty of action, suspense and tough moral choices. The characters are portrayed with refreshing realism - a few four and seven letter words pepper the script along with references to rape, divorce, alcoholism and extra-marital sex, which would have been fairly shocking for the era and probably even when the movie was made in the 1960s.
Despite a few improbable aspects of the plot (eg the officer lives in an unguarded apartment in town where his security is always at risk), the overall result is a convincingly bold, brassy, in-your-face portrayal of life and love in the middle of a dirty war - and a moderately good thriller into the bargain.