The game is based on Whirlwind, the novel by James Clavell, which is set against the revolution in Iran in 1979. Each player is a mercenary helicopter pilot leading missions in the revolution for a fat fee paid into his Swiss bank account. Gradually, one side of the revolution or the other will gain the upper hand and players may choose to declare loyalty to one side or the other in order to gain a cut of the revolutionary spoils - BoardGameGeek