"When a CIA spy ship masquerades as a cruise ship scuttled by a Russian sub, the Genteel Man activates his team, the Sons of Perdition. Onboard is the most technologically advanced weapon of warfare: Night Blade, which lies 700 feet below sea level. As the ship sits precariously on a marine shelf threatening to spill over into an abyss, Sage Whitmore and his team must navigate dangerously through corridors battling not only time but a team of Russian Spetsnaz, who also covet the weapon."