When robotics engineer and ex-Navy SEAL Matinicus "Matt" Hawkins gets a call asking him to survey a shipwreck off the coast of Spain, he jumps at the chance to dive on what may be an intact Minoan vessel, a discovery long considered the Holy Grail of underwater archeology. The find could rip the covers off the mysterious civilization that flourished thousands of years ago on the island of Crete. But as he descends in his submersible to the ocean bottom with Greek archeologist Kalliste Kalchis, Hawkins soon learns that an invisible No Trespassing sign has been posted on the wreck and violators...