At 9am GMT, a message is received simultaneously by the governments of all the world's developed nations demanding a ransom of 20 billion dollars in gold bullion, otherwise a fleet of rockets armed with nuclear warheads would destroy a major city in each country.
The deadline is 9am GMT the following day.
24 hours in which to discover and destroy the rockets, or, if you fail, to pay the ransom.
With only three hours left, the rocket installation is located in a heavily-guarded complex, deep in a giant underground cavern. It can't be blown up because there is not enough time to evacuate the area. There is only one possibility; that is, to launch an attack on the complex using a prototype helicopter gun-ship heavily armed with powerful cannons and bombs.
The brief is - Destroy the complex at all costs. The operation is code-named "Dawn Raider". The pilot chosen for this mission is... you.