It was a clear night when the massive cargo plane took off, its engines roaring as it carried a secret military shipment. But as the plane soared through the sky, an old, beat-up aircraft suddenly appeared, trailing behind it. Suddenly, the smaller plane rammed into the cargo plane, causing it to spin out of control and crash into the remote wilderness below.

Twelve-year-old Alex and his best friend, Emma, were camping in the nearby woods when they heard the loud explosion. Grabbing their flashlights, they raced towards the crash site, determined to investigate and find out what had happened.

As they approached the wreckage, they could see that the cargo plane had been carrying more than just ordinary supplies. Scattered across the ground were military vehicles and high-tech equipment, as well as several unconscious soldiers. And nearby, the small plane that had caused the crash lay in a heap, its pilot nowhere to be found.

"This is no accident," Alex whispered to Emma. "Someone must have deliberately taken down that cargo plane. And they've stolen something valuable from it."