From back cover:
San Cristobal is a glittering island jewel in the Caribbean Sea. Soviet and American agents try to out manoeuvre each other for influence with the government. Orion, naturally wants a closer look. Establishing a new Orion base is a two part operation; first, set up a believable cover and sneak in the equipment necessary; and second, find out what the other espionage organisations - especially Web - are up to in the same area.