Hope saw another sign, a blue background with a large white H in the middle.

This was an unfair temptation, she thought. She had not remembered that the park was only a couple of miles from a hospital.

For a moment, she envisioned turning in that direction. There would be a large swath of bright light, and a sign in neon red spelling out EMERGENCY ENTRANCE. Probably an ambulance or two parked nearby, on a circular entry. Right inside there would be a nurse, behind a desk, doing triage.

She imagined the nurse: a sturdy, middle-aged woman, unfazed by blood or danger. She would take one glance at the wound in Hope’s side, and the next thing Hope would be aware of would be the fluorescent lights of the exam room, and the murmured voices of a physician and nurses as they bent over her trying to save her life.

Who did this to you? someone would ask. They would have a notepad handy to record her words.

I did it to myself.

No, really, who did it? The police are on their way, and they will want to know. Tell us now.

I can’t say.

We have questions. We need answers. Why are you here? Why are you so far from your home? What have you been doing this night?

I won’t say.

That’s not the same as you can’t say. We are suspicious. We have doubts. If you live through this night, we will have many more questions.

I won’t answer.

Yes, you will. Sooner or later, you will. And tell us, why is there someone else’s blood on your coveralls? How did that get there?

Hope gritted her teeth and kept driving.

Sally pulled her car into almost the same spot opposite Michael O’Connell’s apartment that she had occupied earlier that evening. The street was empty, save for the cars parked up and down the block. It was urban dark, where the night blackness tried to creep into corners, join shadows together, fight against all the ambient light that crept out from more vibrant parts of the city.

She looked down first at her wristwatch, then at the stopwatch, which was keeping a running time for the entire day. She breathed in slowly. Time was moving far too slowly.

Sally stared up at the façade of Michael O’Connell’s building. His apartment windows remained dark.

Gazing up and down the street, Sally could feel heat building within her. How close was he? Two minutes? Twenty minutes? Was he even heading this direction at all?

She shook her head. Proper planning, she told herself, would have designated someone to follow him out of his father’s home, so that every step he took that day was monitored. She bit down on her lip. But doing that would have endangered them all, for it would have put one of them in closer proximity to O’Connell than she wanted. That was why she had created the gap-between his exit and his return. But Scott had been dangerously slow at returning the weapon, and now she had no real grasp on where O’Connell might be. Did the air seep from his tire as Scott had promised it would? Had he been sufficiently delayed? Maybes screamed at her like a dissonant symphony of out-of-tune instruments.

Glancing sideways, toward the backpack that contained the gun, she fought off the urge to simply stick it into a trash container behind the building. There would be a more than good chance the cops would still find it. But it lacked the certainty of what she needed, and in a night filled with doubt, this part had to be conclusive.

For a moment, she grasped at the cell phone. Her mind spun wildly to Hope.

Where are you? she asked herself.

Are you okay?

Her hands were shaking. She did not know whether it was out of fear that O’Connell would catch her and destroy everything by doing so, or whether she was afraid for Hope. She pictured her partner, tried to imagine just exactly what had happened to her, tried to read between the lines of what Scott had told her, but every step she took along this path of imagination only frightened her more.

O’Connell was closing in on her, getting nearer with every passing minute; she could sense it. She knew she had to act without delay. And yet, crippled by uncertainty, she hesitated.

Hope was out there, in pain; she could sense that as well. And she could do nothing about it.

She let out a low, slow moan.

And then, with an overwhelming force of will, Sally seized the backpack and launched herself out of the car. She prayed that the night would conceal her as she ducked her head down and rapidly crossed the street. She knew that if anyone saw her and connected her and the backpack to O’Connell and his apartment, everything might unravel. She knew enough not to run, but to measure her pace. Eye contact with anyone would be fatal. Conversation with anyone would be fatal. Anything that made the next few moments noticeable in any manner or form would be fatal. To all of them.

She knew that this was the moment she had to rise to. It was the second where everything that had happened that night hung in some balance. A failure on her part would doom all of them, and possibly Ashley as well. She had the murder weapon in her possession. It was a minute of complete vulnerability.

Sally whispered to herself, Keep going.

As she moved through the vestibule of the apartment, she could hear voices on the elevator, so she ducked into the stairwell and ran up the stairs, taking them two at a time.

She paused by the solid fire door, trying to listen through, then, realizing that that was impossible, she stepped through and walked steadily down the corridor to O’Connell’s apartment. She held Mrs. Abramowicz’s key in her hand, just as she had earlier that day. For a terrible second, she imagined him inside, lying on the bed, the lights out. She should make a plan. What if he was inside? What if he showed up before she finished her task? What if he spotted her in the hallway? What if he saw her on the elevator? Or exiting the building, on the street? What was she going to say? Would she fight him? Would she try to hide? Would he even recognize her?

Her hand shook with questions as she opened the door.

She stepped inside rapidly, closing it behind her.

She listened for breathing, for footsteps, for a toilet flushing, for the tap of computer keys-anything that might tell her she wasn’t alone-but she could hear nothing beyond the tortured noise of her breathing, which seemed to grow in sound and intensity with each passing second. Do it now! Do it now! There’s no time!

She ducked across the entryway, afraid to turn on any light, cursing herself as she bumped against a wall. A little streetlight slipped through the bedroom windows, giving her just enough illumination to see. She caught a glimpse of herself in a mirror. It almost made her scream.

She dashed toward the closet and frantically unzipped the backpack, removing the gun. She could smell the pungent odor of gasoline, just as Scott had warned her. She slipped the gun back into the shoe and rammed the stray sock down over the top to stifle the smell. After pushing it back into position, hoping everything was placed exactly as she had memorized earlier, she rose.

Sally told herself to move calmly, efficiently, to think every step of the way, but she could not. She took the now empty backpack, glanced around rapidly, thought it all looked as it had earlier that day, and turned to head out.

Once again riveted by darkness, she stumbled.

She tried to control her racing fears, told herself not to run. She did not want to crash into anything, maybe knock something over. There had to be no sign at all that someone had been inside the apartment twice that day. Nothing, she told herself, as she waited for her heart to slow, could be more important.

Delaying her exit was almost painful.

When Sally finally reached the door, she almost panicked. He’s there, she thought. She imagined that she could hear his own key in the lock. She thought she heard voices, footsteps.