A man of great power and wealth, Robert Jensen wasn't content with the ordinary. His drive to conquer the world led him to its darkest corners. There, he began to assemble a collection of monsters beyond belief - Sasquatch, Thunderbirds, Skunk Apes, and more.

Broke and desperate, paleontologist Grant Coleman gets the chance of a lifetime exploring a long-sealed cave, the fabled home of a gigantic creatures. NPS Ranger McKinley Stinson discovers a rancher’s prize bull has been butchered by an airborne killer, and tracks the blood trail back to the re-opened cavern. But as she’s about to arrest the trespassers, the unstable roof collapses, trapping all.

On a desolate beach in far northern Scotland, the winter storms have been washing up all manner of things since time began. But buried in the centre of one smaller iceberg is a shard of ancient Viking pottery telling a partial tale of a hidden mysterious island beyond the ice and mist, that was home to a great treasure and even greater horrors. Thawing in the same block of ice was a rotting flap of skin that refused to be identified but had similar skin patterns to a creature not seen for 100 million years.

National Park Service Rangers Kathy West and Nathan Toland are the only ones stationed at Fort Jefferson, a restored Civil War fort sixty miles off Key West, Florida. Two overnight campers go missing but before the rangers can investigate, shady Homeland Security Agent Glen Larsson arrives to close the park due to a purportedly imminent red tide. Things quickly escalate out of control when mercenaries arrive to back up Larsson and imprison the rangers. Larsson’s plan is to free a cast of giant crabs to overrun the park, and then Florida beyond.

A deep sea fracking operation in the Arctic Ocean breaks through into a world hidden for 15-million years, an undersea cavern from the Pliocene Epoch of the Cenozoic Era. Among the prehistoric terrors unleashed is a giant megalodon, a shark so efficient it had no need to change for 20-million years. Asa Iverson was the only survivor from the Global Kulik incident. Now, the nightmares haunt him. Did he see a colossal shark long thought extinct, or was it a hypothermia-induced hallucination?