The race to save humanity begins after earthquakes rock the planet, revealing enormous metallic objects and vast underground graveyards. One such site is in the Arizona desert, where scientists and military personnel work day and night searching for answers. But when the site is suddenly shut down due to seismic activity, one researcher knows she must return. Assistant archaeologist Rebecca Duccati sneaks into the compound alone, and will have to dig deep to find clues in these strange subterranean caves and tunnels. The work is dangerous and frightening, but she feels a connection to this bizarre phenomenon that even she isn’t fully aware of yet.

FBI Special Agent Demzey knows nothing about archaeology; his specialty, anomalous crimes, the fringe edge of the aberrant and the unknown. Demzey is investigating a recent rash of vicious and brutal murders, the clues surrounding the killings both disturbing and inexplicable. He and his assistant Connie Wegman catch a break when they discover remains of two monstrous creatures unknown to science, yet the breakthrough yields no real answers. Meanwhile, attacks on humans continue across the world, the death toll ticking ever higher.

While scientists and intelligence agencies on every continent search for the source of these savage creatures, it will take the combined efforts of Duccati and Demzey to unravel the mystery, though what they uncover could spell the end for humanity.