The story covers three weeks of world headlines the Shah has gone and caught up in the consequent eruption of political and religious fanaticism is the company S-G Helicopters, Aberdeen-based and connected with Struan's of Hong Kong which services the oilfields Andrew Gavallan and Duncan McIver are in charge and as the mullahs and mujhadin become locked in a bloody power struggle, they try to keep their machines flying and their marriages to Iranian wives intact