Primordial Deep is science fiction action/thriller, set in the expanded universe of Janus Descending. When a long extinct sea creature washes up on the shores of Coney Island, marine biologist Dr. Marella Morgan is contacted by a secret organization to investigate the origins of the creature's sudden and unnatural resurgence. Soon, she and a team of explorers find themselves living on the research station The Tiamat, traveling along the abyssal plains as they search for answers far below the waves. But there are dangers in these ancient waters. Reawakened prehistoric monsters are rising from the deep -- jaws wide and waiting, and in the darkness, something is stirring.