With a small group of survivors from Solace in tow, Chandlerand his crew square off against an enemy of the most dangerouskind - a nuclear-powered submarine led by rogue British navalofficers, Sean and Ned Ramsey. XO Slattery interrogates acaptured mercenary from the hospital ship in an effort toextract information on the sub and its mission. As Nathan Jamesengages in a perilous game of cat-and- mouse, the truth aboutthe mercenary sub unfolds.