On the afternoon of May 11, 1996, ValuJet 592 plunged into the Florida Everglades. There were no survivors. But something came through the crash unscathed: a small box with huge implications for humankind. And the one man unlucky enough to discover its whereabouts disappeared without a trace.

Now, 20 years later, the mystery of Flight 592 hits close to home for Del Honeycutt and bestselling mystery author Sabrina Spencer. A shocking revelation launches them into the middle of a dark conspiracy, and locating the box becomes a matter of life or death. They are not alone in the hunt for the mysterious package and very quickly learn that others will stop at nothing to find it and will eliminate anyone who stands in their way.

With killers hot on their trail, Del and Sabrina must navigate dangers lurking both above and below the swamp waters of the Everglades in order to find the box ... and to survive.