But she is also a normal fourteen-year-old girl, and this has been a source of frustration these past weeks as I’ve felt darkness closing in around us, as I lie awake every night, listening for a monster’s footsteps. My daughter is oblivious to the danger because I have hidden the truth from her. I want her to grow up strong and fearless, a warrior woman who is unafraid of shadows. She does not understand why I pace the house late at night, why I latch the windows and double-check the doors. She thinks I am a worrywart, and it’s true: I do all the worrying for both of us, to preserve the illusion that all is right with the world.

That is what Tari believes. She likes San Diego and she looks forward to her first year in high school. She’s managed to make friends here, and heaven help the parent who tries to come between a teenager and her friends. She is as strong-willed as I am, and were it not for her resistance, we would have left town weeks ago.

A breeze blows in the window, chilling the sweat on my skin.

I set the gun down on the nightstand and cross to the window to close it. For a moment I linger, breathing in cool air. Outside, the night has fallen silent, except for a mosquito’s whine. A prick stings my cheek. The significance of that mosquito bite does not strike me until I reach up to slide the window shut. I feel the icy breath of panic rush up my spine.

There is no screen over the window. Where is the screen?

Only then do I sense the malevolent presence. While I stood lovingly watching my daughter, it was watching me. It has always been watching, biding its time, waiting for its chance to spring. Now it has found us.

I turn and face the evil.

Dr. Maura Isles could not decide whether to stay or to flee.

She lingered in the shadows of the Pilgrim Hospital parking lot, well beyond the glare of the klieg lights, beyond the circle of TV cameras. She had no wish to be spotted, and most local reporters would recognize the striking woman whose pale face and bluntly cut black hair had earned her the nickname Queen of the Dead. As yet no one had noticed Maura’s arrival, and not a single camera was turned in her direction. Instead, the dozen reporters were fully focused on a white van that had just pulled up at the hospital’s lobby entrance to unload its famous passenger. The van’s rear doors swung open and a lightning storm of camera flashes lit up the night as the celebrity patient was gently lifted out of the van and placed onto a hospital gurney. This patient was a media star whose newfound fame far outshone any mere medical examiner’s. Tonight Maura was merely part of the awestruck audience, drawn here for the same reason the reporters had converged like frenzied groupies outside the hospital on a warm Sunday night.

All were eager to catch a glimpse of Madam X.

Maura had faced reporters many times before, but the rabid hunger of this mob alarmed her. She knew that if some new prey wandered into their field of vision, their attention could shift in an instant, and tonight she was already feeling emotionally bruised and vulnerable. She considered escaping the scrum by turning around and climbing back into her car. But all that awaited her at home was a silent house and perhaps a few too many glasses of wine to keep her company on a night when Daniel Brophy could not. Lately there were far too many such nights, but that was the bargain she had struck by falling in love with him. The heart makes its choices without weighing the consequences. It doesn’t look ahead to the lonely nights that follow.

The gurney carrying Madam X rolled into the hospital, and the wolf pack of reporters chased after it. Through the glass lobby doors, Maura saw bright lights and excited faces, while outside in the parking lot she stood alone.

She followed the entourage into the building.

The gurney rolled through the lobby, past hospital visitors who stared in astonishment, past excited hospital staff waiting with their camera phones to snap photos. The parade moved on, turning down the hallway and toward Diagnostic Imaging. But at an inner doorway, only the gurney was allowed through. A hospital official in suit and tie stepped forward and blocked the reporters from going any farther.

“I’m afraid we’ll have to stop you right here,” he said. “I know you all want to watch this, but the room’s very small.” He raised his hands to silence the disappointed grumbles. “My name is Phil Lord. I’m the public relations officer for Pilgrim Hospital, and we’re thrilled to be part of this study, since a patient like Madam X comes along only every, well, two thousand years.” He smiled at the expected laughter. “The CT scan won’t take long, so if you’re willing to wait, one of the archaeologists will come out immediately afterward to announce the results.” He turned to a pale man of about forty who’d retreated into a corner, as though hoping he would not be noticed. “Dr. Robinson, before we start, would you like to say a few words?”

Addressing this crowd was clearly the last thing the bespectacled man wanted to do, but he gamely took a breath and stepped forward, nudging his drooping glasses back up the bridge of his beakish nose. This archaeologist bore no resemblance at all to Indiana Jones. With his receding hairline and studious squint, he looked more like an accountant caught in the unwelcome glare of the cameras. “I’m Dr. Nicholas Robinson,” he said. “I’m curator at-”

“Could you speak up, Doctor?” one of the reporters called out.

“Oh, sorry.” Dr. Robinson cleared his throat. “I’m curator at the Crispin Museum here in Boston. We are immensely grateful that Pilgrim Hospital has so generously offered to perform this CT scan of Madam X. It’s an extraordinary opportunity to catch an intimate glimpse into the past, and judging by the size of this crowd, you’re all as excited as we are. My colleague Dr. Josephine Pulcillo, who is an Egyptologist, will come out to speak to you after the scan is completed. She’ll announce the results and answer any questions then.”

“When will Madam X go on display for the public?” a reporter called out.

“Within the week, I expect,” said Robinson. “The new exhibit’s already been built and-”

“Any clues to her identity?”

“Why hasn’t she been on display before?”

“Could she be royal?”

“I don’t know,” said Robinson, blinking rapidly under the assault of so many questions. “We still need to confirm it’s a female.”

“You found it six months ago, and you still don’t know the sex?”

“These analyses take time.”

“One glance oughta do it,” a reporter said, and the crowd laughed.

“It’s not as simple as you think,” said Robinson, his glasses slipping down his nose again. “At two thousand years old, she’s extremely fragile and she must be handled with great care. I found it nerve-racking enough just transporting her here tonight, in that van. Our first priority as a museum is preservation. I consider myself her guardian, and it’s my duty to protect her. That’s why we’ve taken our time coordinating this scan with the hospital. We move slowly, and we move with care.”

“What do you hope to learn from this CT scan tonight, Dr. Robinson?”

Robinson’s face suddenly lit up with enthusiasm. “Learn? Why, everything! Her age, her health. The method of her preservation. If we’re fortunate, we may even discover the cause of her death.”

“Is that why the medical examiner’s here?”

The whole group turned like a multieyed creature and stared at Maura, who had been standing at the back of the room. She felt the familiar urge to back away as the TV cameras swung her way.

“Dr. Isles,” a reporter called out, “are you here to make a diagnosis?”

“Why is the ME’s office involved?” another asked.

That last question needed an immediate answer, before the issue got twisted by the press.