You've got to love modern technology, Luca Portero thought, smiling as he spotted Ellis Sinclair's silver Lexus SUV half a dozen car lengths ahead on the George Washington Bridge.

Luca had equipped the Lexus with a transponder that let him know its location no matter where it went. He glanced at the locator screen, glowing in the dark on the passenger seat. Luca's car was a fixed dot in the center of the green LCD monitor; the Lexus was a blip floating directly above it. A GPS program laid out a map of the city around them, showing both cars crossing the Hudson River toward the city.

All was well.

Well?he thought. Who am I kidding?

He shook his head. He'd almost forgotten whatwell meant. Nothing was anywhere nearwell .

Darryl Lister had become a raw, twitching nerve after he learned of the fateful question at the stockholders' meeting, a nonstop question box:Who asked it? How could he know?

Well, Luca had soon found out that it wasn't a 'he' at all. The meeting had been recorded - a matter of routine - and who did he spot while reviewing the video files: Cadman. Romy fucking Cadman.

Initially Lister had been sure that Palmer had talked under his own Totuus, but then they'd tracked the operative to some Long Island hospital where he was spending his days sitting around babbling gibberish. Obviously the MTW had worked.

Luca shuddered at the thought of such a fate, even if the effect only lasted for ninety days. Ninety days of hell. If you weren't loony before, you damn sure might be after.

But the success of the MTW had sent Luca back to the leak problem.

He already knew it was Ellis Sinclair. But who was he was leaking to? That was what mattered. Tonight Luca would find out. Once he learned Sinclair's contact, the rest would fall into place. Then he'd make his move. And take no prisoners.

He followed Sinclair down the West Side Highway to Fifty-fourth Street, crawled across Midtown -  traffic in the city would be murder until after Christmas - to a parking garage across the street from the Warwick Hotel. Shit! He couldn't very well pull in right behind him. He should have brought backup.

He left the car double-parked and running while he trotted to the ramp that led down to the parking area. Crouching, he spotted Sinclair accepting a ticket from the attendant. But instead of walking back this way, he started up the ramp on the other side.

Fuck! He was heading out to Fifty-third!

Luca ducked back into his car. He folded up the locator unit and grabbed the keys. As he slammed and locked the door he heard a voice behind him.

"Can't leave that here."

He turned to see an NYPD uniform. Black, big face, big gut stretching his blue shirt, big black belt laden with police paraphernalia.

"Officer, this is an emergency."

"I don't care if your hair is on fire, you can't leave that car here. There's a garage right there. Pull it in and - "

"I don't have time. I'll be right back."

"You leave that car there, I promise you, it'll be long gone and far away when you come back."

"Fine," Luca said, moving off. He tossed the keys to the cop. "Take it. Merry Christmas."

The cop opened his mouth, then closed it. Luca doubted he'd ever had anyone tell him to go ahead and tow his car.

Luca dashed straight through the garage - down, across, and up onto Fifty-third. He stopped when he reached the sidewalk, frantically peering east and west through the lights, the shadows, the people hurrying to escape the chill.

Which way, damn it?

He glanced longingly at the locator unit, dangling from his hand like a small valise. If only there had been some way to affix a transponder to Sinclair himself.

Never mind the wishing. What now?

He couldn't see Sinclair on Fifty-third. Maybe he'd headed downtown on Sixth Avenue. Luca's instincts urged him in that direction. He started off at a run but the crowds on the avenue slowed him to a crawl. The Radio City Music Hall Christmas Show was in full swing, jamming the Sixth Avenue sidewalks with parents and their screaming kiddies. But that meant Sinclair couldn't move fast either.

Luca bullied and bulled his way through the throng as fast as he could, earning angry looks and comments. Yeah, merry Christmas to you too, fuckers. He kept rising on tiptoes to check the other side of the street - he saw oversized Venus de Milos framing the Credit Lyonnaise Building, and a line of fifteen-foot nutcrackers standing guard against the columns of the Paine-Webber, but no Ellis Sinclair.

An Art Deco marquee directly ahead now,Radio City blazing in red neon, and the damned charter busses vomiting tourists onto the sidewalk blocked his view of the opposite side. No sign of Sinclair here, so he stepped between two buses to check the other side - just in time to spot Sinclair starting down a subway entrance by the Time & Life Building.

Luca congratulated his instincts. And his luck. But it occurred to him that Sinclair was moving pretty quick for a guy who was supposedly dosed to the eyeballs on antidepressants.

No time to wonder about that now.

He sprang forward to follow but a horn blared him back. The light was against him and traffic was moving just fast enough to make crossing impossible. Cursing, he edged to the corner. As soon as the light changed Luca lunged forward, damn near knocking down a few slow movers on his way to the subway. He flew down the steps and raced along the longest, fanciest goddamn subway ramp he'd ever seen - marble tile, brass trim, all part of the Rockefeller Center complex.

When he reached the token booth, Sinclair was nowhere in sight.

Uptown or down?

He saw theALL TRAINS sign and ducked under the turnstile - no time for a token - and followed the sound of a train pulling in. He reached the platform just in time to see the doors of an F train pincer closed behind Sinclair.

Luca pelted after the train as it began to move, intending to grab a handle and jump onto the landing between the cars, but it picked up speed too quickly and he was left standing on the platform.

The lighted sign on the rear car said its last stop was 179th Street in Jamaica. That meant Sinclair could be going across town or to the far side of Queens, or anywhere between.

He let out a roar and kicked the nearest tiled pillar.

"Hey, don't worry, buddy," said a shabby guy a few feet away. "There'll be another along soon."

Luca wanted to kill him.