On the shores of Egypt's Red Sea, Lukas Berger sets out to break the world record for free diving, a moment he's been preparing for his entire life. Before him yawns the Blue Hole, a mythical abyss renowned for its beauty as well as its danger. Lukas will not resurface. He disappears, as if the abyss had absorbed him. Did he drift off course? Did he have a fainting spell that dragged him down under? When the mutilated body of another diver is discovered in the depths soon thereafter, Lukas' wife is convinced his disappearance was no accident. And seeking out the truth will bring to light some very dark stories indeed...