In an instant, the I-403's deck gun boomed as the submarine's experienced gun crew attempted to halt the oncoming dervish. The slim, head-on profile of the destroyer made for a difficult target, however, and the shell passed harmlessly to one side. Hurriedly, the gun crew took aim and fired again.

Once identifying the ship as a destroyer, Ogawa recognized the futility of a surface duel with a superior vessel and immediately ordered a crash dive. The mission would have to be sacrificed for the safety of the ship and crew, he reasoned, if it wasn't already too late.

As the dive alarm sounded, the gun crew fired off a last desperate shot before scrambling belowdecks to safety. The gunner's accuracy was nearly dead-on, but he overcompensated the approaching speed of the destroyer. The shell splashed into the water fifty feet directly ahead of the American ship's bow, blasting a spray of water onto its deck but causing no damage.

The two forward batteries of the Theodore Knight ax last came to life, lobbing five-inch shells in succession toward the Japanese sub. The inexperienced and adrenaline-fortified gun crew fired high, however, placing the destroyer's shells harmlessly beyond the now-accelerating submarine.

On the exterior bridge of the I-403, Ogawa hesitated momentarily before dropping down the hatch, taking a final glance at his approaching stalker. Movement caught his eye on the forward deck, where he was surprised to see a crewman striding toward one of the airplanes. It was a pilot, ignoring the dive command and climbing into his plane. In the spirit of the kamikaze, the pilot could not bear the thought of losing his aircraft and was willing to die with it instead. Ogawa cursed his foolish bravery, then ducked down into the bridge below.

The ballast tanks were opened and a rush of seawater began flooding in to weigh the submarine down. The huge hull of the I-403 was a liability in this situation, requiring a notoriously long time to submerge. As Ogawa waited for the sub to make its agonizingly slow descent, he played one more card.

“Prepare to fire torpedoes!” he commanded.

It was a gamble, but a calculated one at that. With the destroyer directly ahead, Ogawa could let go a shot in the face of the ship and make the hunter fall prey to the victim.

“Tubes loaded,” the torpedo officer reported.

“Stand by tubes number one and number two,” Ogawa ordered.

The destroyer was barely two hundred yards away and still belching fire from its five-inch guns. Amazingly, the destroyer's guns continued to miss their mark. The point-blank target of the sub slowly began to diminish as the nose of the undersea craft dipped beneath the waves and a wash of seawater gradually flooded over the forward deck.

“Fire one!” Ogawa shouted. Counting off three seconds silently, he paused, then ordered, “Fire two!”

With a blast of compressed air, the two torpedoes burst out of the forward tubes on a deadly streak toward the advancing destroyer. Each packing an 890-pound lethal warhead, the twenty-three-foot-long, oxygen-powered torpedoes accelerated quickly, racing toward the Theodore Knight at better than 45 knots.

An ensign standing on the bridge wing of the destroyer noticed a seam of white trails under the water's surface burrowing toward the ship.

“Torpedoes off the port and starboard bow!” he shouted, though his body remained frozen in rapt fascination as he watched the speeding explosives approach.

In an instant, the torpedoes were on them. But either by miscalculation, divine intervention, or just plain luck, the two deadly fish somehow missed their target. The immobile ensign watched in amazement as the two torpedoes skimmed past both sides of the destroyer's bow, then raced down the length of the ship no more than ten feet from either side of the hull before disappearing beyond the stern.

“She's diving, sir,” noted the destroyer's helmsman as he watched the waves slosh over the bow of the sub.

“Steer for the conning tower,” Baxter commanded. “Let's go right down her throat.”

Firing from the forward batteries had ceased, as the guns could no longer be trained on a target so low to the ship's bow. The battle became a race, the destroyer boring in like a charging ram in an attempt to batter the I-403. But the submarine was gaining depth and, for a moment, appeared like it would successfully slip beneath the stalking ship. The Theodore Knight had crossed over the bowline of the sub, its keel missing the top deck of the descending sub by a matter of feet. But the destroyer drove forward, intent on crushing the submersing vessel.

The aircraft were the first to feel the sharp wedge of the destroyer's prow. Partially submerged on the receding deck, the randomly aligned airplanes just caught the surging bow of the ship at mid height and were instantly dissected into large sections of mangled metal, fabric, and debris. The defiant pilot, who had climbed into the cockpit of the first airplane, received little time for impudence before realizing his wish to die with his plane in a crushing blow.

The I-403 itself was now half submerged and had so far avoided damage from the assault. But the sub's conning tower was too great a protrusion and could not escape the charging wrath of the ship. With a crunching shear, the bow of the destroyer tore into the vessel's console, slicing through it like a scythe. Ogawa and his operations officers were killed instantly as the ship crushed into and through the control center of the sub. The entire structure was ripped away from the body of the submarine as the destroyer continued its onslaught, carving a mutilating gash along the rear spine of the I-403. Inside, the doomed crew heard the screeching grind of metal on metal before the torrents of seawater burst in and flooded the compartments. Death came quickly but painfully to the drowning men as the sub lurched, then dropped rapidly to the seafloor. A smattering of air bubbles and oil boiled to the surface to mark the gravesite, then all was silent.

Aboard the Theodore Knight, the crew and officers cheered their destruction of the Japanese submarine as they watched the telltale slick of black oil and fuel pool on the surface like a death cloud above the sunken boat. How lucky they were to have found and destroyed an enemy vessel right on their own home shores, with not so much as a casualty on their own ship. Though the enemy had fought with valor, the victory had come easily. The crew would return to port as heroes, with a great tale to tell their grandchildren. What none of the men on the destroyer could have suspected or imagined, however, was the unspeakable horror that would have befallen their countrymen had the I-403 succeeded in its mission. Nor could they know that the horror still awaited, silently beckoning from the depths of the shattered wreckage.

Mystery trawler and NUMA May 22, 2007 The Aleutian Islands, Alaska The winds swirled LIGHTLY about the faded yellow tin hut perched on a small bluff overlooking the sea. A few light snowflakes danced about the eaves of the structure before falling to the ground and melting amid the grass and tundra. Despite the nearby hum of a diesel generator, a wooly Siberian husky lay on a sun-exposed patch of loose gravel enjoying a deep sleep. A white-feathered arctic tern swooped by for a look, then stopped momentarily on the small building's roof. After curiously examining the odd assortment of antenna, beacons, and satellite dishes adorning the rooftop, the small bird seized a gust of wind and flew away in search of more edible offerings.

The Coast Guard weather station on Yunaska Island was as tranquil as it was remote. Situated midway along the Aleutian chain of islands, Yunaska was one of dozens of volcanic uprisings that curved off the Alaskan mainland like an arched tentacle. Barely seventeen miles across, the island was distinguished by two dormant volcano peaks at either end, which were separated by rolling grass hills. Absent a single tree or high shrub, the green island rose like an emerald from the surrounding frigid ocean waters in the late spring.