Tom laughed, then abruptly frowned. "Hey! What's that character up to?" he said. "Trying to buzz us?"
A sleek gray jet without markings was arrowing in on them from three o'clock. Bud flicked on the radio and barked a warning. The plane made no response. As it kept coming, Tom increased speed—then rolled, dived, and changed course, but failed to shake off their pursuer.
Bud, meanwhile, was frantically calling Enterprises and a nearby airport, but getting no response. Yet their radio was working, for a voice suddenly crackled:
"Follow the mystery plane for a landing and you won't be harmed!"
A HUNCH PAYS OFF
Dismayed, Tom and Bud stared at each other. Apparently the enemy ship had blanked out their radio communication to all points except the mystery plane.
"Who are you and what do you want?" Tom said into his microphone.
The voice replied crisply, "You'll find out when the time comes!"