Where the pressure can crush a submarine like a soda can, and water boils hot enough to melt metal, the sea reveals a new hope -- and an ancient terror. A biostrike is thwarted in Manhattan. A submersible is lost at sea. An archeological dig is attacked. These three seemingly disparate events force CDC-freelancer Marie Barrande, MD, and paleontologist Adam Stone together to prevent the next attack. They descend to the abyssal depths of the ocean at the Philippine Trench, one of the most inhospitable places on the planet, in search of enzymes to combat the bio-threat. What they discover will leave them ensnared in a web of deceit spun by those more vicious and cunning than the prehistoric creatures lurking beneath the depths of the sea ... DEEP VENT!