After barely escaping the perilous expedition to the Antarctic to locate a WW2 Nazi Ice Station Dave Purdue once more elicits the help of historian Dr. Nina Gould and award winning investigative journalist Sam Cleave. When the maintenance submersible from Purdue's oil drill, Deep Sea One, goes missing off the coast of Scotland in the North Sea, he discovers the wreck of a sunken WWII German submarine beneath. Inside, Purdue, Sam and Nina find an ancient...