She frowned. “This perp pays attention to detail.”

“Wait till you see what’s inside.”

She walked up the steps and pulled on shoe covers and gloves. Close up, Frost looked even worse, his face gaunt and drained of all color. But he took a breath and offered gamely: “I can walk you in.”

“No, you take your time out here. Rizzoli can show me around.”

He nodded, but he wasn’t looking at her; he was staring off at the street with the fierce concentration of a man trying to hold on to his dinner. She left him to his battle and reached for the doorknob. Already she was braced for the worst. Only moments ago, she had arrived exhausted, trying to shake herself awake; now she could feel tension sizzling like static through her nerves.

She stepped into the house. Paused there, her pulse throbbing, and gazed at an utterly unalarming scene. The foyer had a scuffed oak floor. Through the doorway she could see into the living room, which was furnished with cheap mismatches: a sagging futon couch, a beanbag chair, a bookcase cobbled together from particle board planks and concrete blocks. Nothing so far that screamed crime scene. The horror was yet to come; she knew it was waiting in this house, because she had seen its reflection in Barry Frost’s eyes and in the ashen face of the woman detective.

She walked through the living room into the dining room, where she saw four chairs around a pine table. But it was not the furniture she focused on; it was the place settings that had been laid out on the table, as though for a family meal. Dinner for four.

One of the plates had a linen napkin draped over it, the fabric spattered with blood.

Gingerly she reached for the napkin. Lifting it up by the corner, she took one look at what lay underneath it, on the plate. Instantly she dropped the napkin and stumbled backward, gasping.

“I see you found the left hand,” a voice said.

Maura spun around. “You scared the shit out of me.”

“You want some seriously scary shit?” said Detective Jane Rizzoli. “Just follow me.” She turned and led Maura up a hallway. Like Frost, Jane looked as if she had just rolled out of bed. Her slacks were wrinkled, her dark hair a wiry tangle. Unlike Frost, she moved fearlessly, her paper-covered shoes whishing across the floor. Of all the detectives who regularly showed up in the autopsy room, Jane was the one most likely to push right up to the table, to lean in for a closer look, and she betrayed no hesitation now as she moved along the hall. It was Maura who lagged behind, her gaze drawn downward to the drips of blood on the floor.

“Stay along this side,” said Jane. “We’ve got some indistinct footprints here, going in both directions. Some kind of athletic shoe. They’re pretty much dry now, but I don’t want to smear anything.”

“Who called in the report?”

“It was a nine-one-one call. Came in just after midnight.”

“From where?”

“This residence.”

Maura frowned. “The victim? Did she try to get help?”

“No voice on the line. Someone just dialed the emergency operator and left the phone off the hook. First cruiser got here ten minutes after the call. Patrolman found the door unlocked, came into the bedroom, and freaked out.” Jane paused at a doorway and glanced over her shoulder at Maura. A warning look. “Here’s where it gets hairy.”

The severed hand was bad enough.

Jane moved aside to let Maura gaze into the bedroom. She did not see the victim; all she saw was the blood. The average human body contains perhaps five liters of it. The same volume of red paint, splashed around a small room, could splatter every surface. What her stunned eyes encountered, as she stared through the doorway, were just such extravagant splatters, like bright streamers flung by boisterous hands across white walls, across furniture and linen.

“Arterial,” said Rizzoli.

Maura could only nod, silent, as her gaze followed the arcs of spray, reading the horror story written in red on these walls. As a fourth-year medical student serving a clerkship rotation in the ER, she had once watched a gunshot victim exsanguinate on the trauma table. With the blood pressure crashing, the surgery resident in desperation had performed an emergency laparotomy, hoping to control the internal bleeding. He’d sliced open the belly, releasing a fountain of arterial blood that gushed out of the torn aorta, splashing doctors’ gowns and faces. In the final frantic seconds, as they’d suctioned and packed in sterile towels, all Maura could focus on was that blood. Its brilliant gloss, its meaty smell. She’d reached into the open abdomen to grab a retractor, and the warmth that had soaked through the sleeves of her gown had felt as soothing as a bath. That day, in the operating room, Maura had seen the alarming spurt that even a weak arterial pressure can generate.

Now, as she gazed at the walls of the bedroom, it was once again the blood that held her focus, that recorded the story of the victim’s final seconds. When the first cut was made, the victim’s heart was still beating, still generating a blood pressure. There, above the bed, was where the first machine-gun splatter hit, arcing high onto the wall. After a few vigorous pulses, the arcs began to decay. The body would try to compensate for the falling pressure, the arteries clamping down, the pulse quickening. But with every heartbeat, it would drain itself, accelerating its own demise. When at last the pressure faded and the heart stopped, there would be no more spurts, just a quiet trickle as the last blood seeped out. This was the death Maura saw recorded on these walls, and on this bed.

Then her gaze halted, riveted on something she had almost missed among all the splatters. Something that made the hairs on the back of her neck suddenly stand up. On one wall, drawn in blood, were three upside-down crosses. And beneath that, a series of cryptic symbols:

“What does that mean?” said Maura softly.

“We have no idea. We’ve been trying to figure it out.”

Maura could not tear her gaze from the writing. She swallowed. “What the hell are we dealing with here?”

“Wait till you see what comes next.” Jane circled around to the other side of the bed and pointed to the floor. “The victim’s right here. Most of her, anyway.”

Only as Maura rounded the bed did the woman come into view. She was lying unclothed and on her back. Exsanguination had drained the skin to the color of alabaster, and Maura suddenly remembered her visit to a room in the British Museum, where dozens of fragmented Roman statues were on display. The wear of centuries had chipped at the marble, cracking off heads, breaking off arms, until they were little more than anonymous torsos. That’s what she saw now, staring down at the body. A broken Venus. With no head.

“It looks like he killed her there, on the bed,” said Jane. “That would explain the splatters on that particular wall and all the blood on the mattress. Then he pulled her onto the floor, maybe because he needed a firm surface to finish cutting.” Jane took a breath and turned away, as though she had suddenly reached her limit, and could not look at the corpse any longer.

“You said the first cruiser took ten minutes to respond to that nine-one-one call,” said Maura.

“That’s right.”

“What was done here-these amputations, the removal of the head-that would have taken longer than ten minutes.”

“We realize that. I don’t think it was the victim who made that call.”

The creak of a footstep made them both turn, and they saw Barry Frost standing in the doorway, looking less than eager to enter the room.

“Crime Scene Unit’s here,” he said.

“Tell them to come on in.” Jane paused. “You don’t look so hot.”

“I think I’m doing pretty good. Considering.”

“How’s Kassovitz? She finished puking? We could use some help in here.”