In 1945, Navy Training Flight 19 disappears in the Bermuda Triangle.
In 1963, the USS Thresher, a nuclear submarine, is lost under unusual circumstances, along with a SR-71 spy plane that crashes near the legendary city of Angkor Kol Ker in Cambodia at the exact same time. Both are part of a secret government investigation into mysterious gates opening on the planet's surface. Green Beret Eric Dane leads a team of operatives to recover the black box and encounters a strange fog. His entire team disappears, attacked by strange creatures out of the fog. Only Dane survives to return.
Present day: Another plane goes down and no one should have survived—but they did. It’s in the same area Dane lost his team. He’s called back. To find out who is the darkness behind these gates to our planet. What does this Shadow force want? It is a threat that will take on the world’s greatest military forces and defeat them. A power that will overwhelm our science and technology. A merciless enemy that will lead Dane—and the whole planet—into the final desperate battle for survival.
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