"Guaranteed to hook teen readers ... Pam Withers has crafted such a thrilling yet utterly believable text that this reader stopped at several points to Google details, not believing it was fiction ... It's a gripping story that makes tough choices relatable, difficult concepts understandable, and adventure unforgettable." -- Canadian Teacher Magazine

Hudson Greer and his caving partner, Jett, are determined to become teen legends who discover a long-sought passageway that connects two giant cave systems in their little mountain town. But they're haunted by the history of a giant sinkhole that opened up and swallowed the town's fully-packed church, steeple and all. Dozens were killed, including Hudson's grandfather. Hudson knows it's in danger of happening again; he just doesn't know when or where.

Can his caving instincts and science knowledge predict or prevent the next disaster? Are the shoddy logging practices of the town's main employer tempting fate? And who's on whose side when business and political shenanigans mix with evaded environmental codes?