At the edge of a small desert town, where a B-17 sits next to an old diner, a mystery has begun to unfold. At first it was just a strange voice on an old radio. Then there's a robbery at the Ambrosia cultural museum--priceless Aztec relics are stolen. And Ben has an encounter in the desert that can only be described as out-of-this-world. When mystery lights begin to appear in Navajo Mesa, the local sheriff grows strangely silent about it all. But four everyday kids who call themselves the Last Chance Detectives have decided to investigate. Little do they know they are being drawn into a serious plot with international consequences.