Speed and his family are on the way to the Grand Prix (which is the key race for the World Racing Championship) and their plane is forced down on to an island by a storm. On the island they find out: that both the plane's and the Mach 5's radios have been smashed; every other passenger is in a hurry to get where they are going; there are no plants or food on the island, and that the island is likely a forgotten top secret base used during World War II...