The fossilized remains of a previously unclassified hominin species are discovered in the Altai Mountains, prompting teams of scientists from around the globe to converge upon this isolated region of Siberia in search of further evidence to corroborate the revolutionary theory that a third proto-human ancestor coexisted with Neanderthals and primitive Homo sapiens.

What awaits them is anything but extinct.

FBI Special Agent Grey Porter leads the investigation into the mysterious circumstances surrounding the appearance of a factory trawler of Russian origin off of the Washington Coast. He finds twelve bodies; all of them exsanguinated through ferocious bite wounds on their necks. According to the manifest, there should have only been eleven.

Whatever killed them is no longer on board.

Elena Sturm of the Seattle PD is assigned to patrol the waterfront renovation project on Salmon Bay. While rousting the homeless from the underground warrens of the massive construction site, she stumbles upon the corpse of a man whose wounds are identical to those of the victims aboard the ghost ship.

Something has cut a bloody swath across the Pacific.

And it's already here.