In 830 AD, a brilliant Maya architect constructed a massive vault deep within a hidden canyon. For centuries, it has protected an astonishing treasure ... and a terrifying secret.

Haunted by tragedy, Cy Reed leads a salvage expedition to one of the last untouched places on Earth. Meanwhile, a shaman senses a disturbing shift in the natural order. And a famous archaeologist searches for the fate of a lost civilization.

Assaulted by endless rain, bizarre phenomena, and mythical creatures, Reed races to solve a puzzle millions of years in the making. Forging a path through cursed tunnels and deadly traps, he fights his way toward an epic discovery that could free him from his demons ... or drown him under a tidal wave of destruction.