The year is 1987. Military Intelligence has sent reports of an awesome new Soviet sub that no one in the West has ever seen before in the Russian-patrolled seas off the Kamchacka Peninsula. Now Tom Gorden, new commander of the Los Angeles Class submarine Pittsburgh, must transport a hand-picked team of U.S. Navy SEALs into hostile waters and go up against the phantom boat - even at the risk of a shooting war. But the enemy has its own reasons for luring U.S. forces onto Russian turf. And there is a highly placed spy in the American ranks who may, even now, be leading a boat full of brave men to their doom.