After the king was murdered by Majid, 14-year-old prince Hassad is the sole heir to the throne of Burdabi. Because he is still very young, lieutenant general Mahmud Majid rules in his place. He was one of the conspirators of the attempt on the king and now wants to remove the prince permanently. The American Secret Service learns about the plan. Steve must protect the heir posing as a pilot for a flying team known as The Thunderbirds.