“What are we missing?” Aaron asked Christian as they walked around, practically in circles, looking for the place where Giovani and Cadence had disappeared. The helicopters both circled overhead, using their bright light to illuminate the ground where the Guardians were searching, but so far it had done no good.

Aaron stopped pacing for a moment and surveyed the area slowly one more time. Where would you hide an entrance to a tunnel? If it wasn’t in the ground, where else could ...