She replaced the phone with more force than was necessary, and stood to her full height. “C’mon, Mr. Phelps. This is going to be fast and furious.”

FIFTY MILES FROM Davy Jones’s Locker, the rolling surface of the dark sea erupted in an explosion of foam and spray. A twenty-foot-long aluminum tube burst from the center of the churning geyser, sped skyward at a sharp angle, leaving a white fan-shaped trail behind it, and quickly dove back toward the waves in a curving trajectory.

Within seconds, the cruise missile had leveled out, until it was traveling twenty-five feet above the wave tops, so low that its passing left a wake in the water. Powered by its solid-fuel rocket booster, the missile quickly accelerated, and by the time it had shed its rocket and the fan-jet engines had kicked in it had achieved its cruising speed of five hundred miles per hour.

A series of sophisticated guidance systems kept the cruise missile on track as unerringly as if it were being steered by a skilled pilot.

The speeding missile’s unsuspecting target was a large, gray-hulled ship anchored near the red-and-white buoy that marked the location of the undersea lab. The name on the hull was PROUD MARY, and it was registered in the Marshall Islands as a survey ship. The Proud Mary was anchored near the buoy waiting for the shuttle sub to return with Phelps.

The ship’s owner was a shadowy corporation that provided vessels to international security companies in need of naval services. They supplied everything from small, fast, and heavily armed speedboats to ships large enough to land an army of mercenaries anywhere in the world.

Assigned to protect the undersea laboratory, the Proud Mary carried two dozen guards proficient in the use of every type of small arms as well as an array of electronic sensing gear that could pick up vessels or planes approaching the lab. The ship also served as a parking garage for the shuttle that ferried supplies and people to and from the lab.

In its leap from the ocean, the cruise missile had blipped on the ship’s radar screen for only a few seconds. Inactivity had dulled the operator’s edge, and he was engrossed in a motorcycle magazine when the missile made its brief appearance, before dropping from surveillance’s view. The ship also had infrared sensors, but even if the missile had been flying at altitude they would have failed to pick up the low-temperature heat from its engines.

Undetected, the missile streaked toward the Proud Mary carrying a half ton of high explosives in its warhead.

LOIS MITCHELL AND GORDON PHELPS were making their way along the connecting tube to the control room when they heard a loud whump that seemed to come from far over their heads. She stopped in her tracks and pivoted slowly, ears cocked, concerned that it indicated a systems failure.