At the end of the concrete passage, we found the first skull. Joe spotted it, his keen eyesight picking out the yellowed bone amid a stack of hats. “Murdock, there’s an awful lot of stuff down here. We should call for backup,” I said.

Murdock squatted in front of the skull as if he were going to question it. He shined his light in the direction we had been walking. “I think I see stairs. This looks like a sealed-off basement.”

“We’re in the Weird, Murdock. Basements are either abandoned or you wish they were.”

We went to the foot of the stairs. Rusted metal steps led up to more darkness, concrete-skimmed walls crackling off to show the brick beneath, paper trash covered in sooty dust lining the sides of the treads. “Up or back?” I asked.

Murdock stared into the darkness of the stairs. “Back. We need to have this whole place secured.”

“I found a body!” Joe shouted.

We swung our lights toward him. Halfway back in the basement, Joe’s essence illuminated a pile of clothes against the brick wall. As we retraced our steps, my sensing ability picked out a null spot below him, an essenceless void. Our lights exposed a small woman propped against the wall, ashen-faced, her dark hair long and greasy. Her skin pulled tightly over her bone structure, as though she had no fat, her prominent face bones in stark relief to the wells of her closed eyes and open mouth. She didn’t look like she had been dead long.

“There’s a head in her lap. I think it’s the one you’re looking for,” Joe said.

As he lowered for a closer look, something stirred around the null zone of the body, a purple-black essence forming in my sensing ability where none had been a moment before. The strange haze coalesced into thick ropes undulating in the air a foot or so above the body. “Careful, Joe. Something’s there,” I called out.

As he reached for the sword that he kept hidden against his side, an essence strand shot at him, and the woman’s eyes flew open, revealing deep black pits with no whites. She hissed with a thick rasp.

Joe yelped and popped out of sight. Kill it! Kill it! Kill it! he sent from wherever he had vanished to. He materialized behind us. “It’s a leanansidhe. Kill it!”

Murdock’s body shield flared in dense crimson around us as he pulled his gun. The woman flattened herself against the wall, pressing her head sideways and staring at us with her eerie dark eyes. “What the hell is that?” Murdock said.

“Holy shit, get out of here, Joe,” I said. He popped out.

Thick purple strands of essence burst out of the leanansidhe and burrowed into Murdock’s body shield. He grunted and staggered into me. I grabbed him by the waist and pulled. The strands tightened and pulsed, fighting against me.

“Shoot it!” I shouted.

Murdock moved in a daze, his arms flailing. He dropped his flashlight. The gun went off, the shot ricocheting into the darkness. A strand of purple essence dove at me, spearing my chest with cold, sharp pain. The dark mass in my head flared, and I screamed.

The dark mass moved inside my head, plunging downward with a hot, burning surge. A spike of black light ripped from my chest and coiled around the purple essence, leaping along the strand and wrapping around the leanansidhe. Murdock fell from my arms as the darkness yanked me forward. The dark spike lifted the leanansidhe and slammed her against the floor. She screamed and released her essence, the purple strands retracting wildly into her body until she became a strange null void again. The thing in my head sucked the black spike back inside me.

Gagging, I fell to my knees. Both flashlights lay on the floor, illuminating dust in the air. A growled panting came from the darkness. I shuffled on my knees and retrieved a flashlight, playing the beam along the wall until I spotted the leanansidhe. She winced when the light struck her, but held her ground in a crouch. “My apologies, my brother. Forsooth, I did not know the prey was yours,” she said.

“He’s not my prey,” I said.

She chuckled, revealing slick, blue-tinged teeth. “Yes, yes, my brother, I’ve played that game. Spool it in with hope and comfort. ’Tis sweeter in the final strike, no? Pray, bring me a sip of this one before it fades. I’ve never tasted the like before and would savor it again.”

I slipped a dagger from my boot. “I don’t know what you’re talking about. Stand up slowly and keep your hands where I can see them.”

She jutted her chin out and stretched her head toward me, her nostrils quivering as if she were scenting me. “Ah, you are young, my brother. Denying what you are will change nothing. You will reach from without or die.”

“I said stand up.”

“Peace between us, my brother. I leave you to your prey.” She scuttled backwards and vanished into the wall.

“Stop!” I ran forward. At the bottom of a blocked archway, missing bricks formed a hole. She had escaped to the other side of the wall. I crouched and saw nothing but more darkness. The opening was too small for me to follow.

Joe flashed into sight high above, then flickered out in less than a breath. A moment later, he reappeared, sword out and ready. “Is she gone?”

I hurried over to where Murdock lay prone. “Yeah, she’s gone.”

With an anxious look, Joe flew over Murdock. “Is he dead?”

I checked his pulse. “No. Backdraft from the attack.”

Murdock lay on his side. Joe settled onto his shoulder and flashed a sphere of essence into him. Flits weren’t healers, but they had a knack for enhancing the healing process. Murdock shook his head like someone had thrown cold water over him.

I helped him up. “Easy, let your head settle.”

His hand jumped to his holster. “Where’s my weapon?”

Joe pointed. “It’s bending over there.”

Metal warped essence and screwed around with spells. All fey sensed it, and flits had a keener sense than most. Because they teleport using essence, not being sensitive to metal could have fatal consequences.

Murdock picked up the other flashlight and found his gun. “What happened?”

I leaned against a wall. “This is the part where I say I told you so.”

Murdock leaned against a support and took a deep breath. “What the hell was that thing?”

“A leanansidhe. It’s a nasty solitary that feeds on living essence. Apparently, you were tasty,” I said.

He trained his flashlight beam along the wall. “That is undoubtedly the creepiest thing that’s ever happened to me.”

I played my own flashlight around us, illuminating more piles of clothing and shoes. “They’re parasites. I didn’t even know we had one in the Weird. It looks like she’s been down here a long time.”

“I guess we found our killer,” he said.

I pulled my jacket around me as a chill wind blew from somewhere. “Maybe not. Leanansidhes aren’t physically strong, but they’re sneaky. She wouldn’t risk a physical confrontation, and the Dead guy at the headworks was big. She’s probably been picking off homeless people down here when they’re sleeping. I bet she found that head down here somewhere.”

Murdock wandered to where the head lay discarded on the floor. A look of disgust ran over his face. “What the hell was she doing with it?”

I shrugged. “Not sure. It might have something do with the ability of the Dead to regenerate. Meryl said they can’t come back without their heads. Maybe there’s an essence thing going on.”

Murdock stepped back from the head. “Well, counting that skull over there, we have three murder cases to close now, and that thing’s our primary suspect. We need to find her.”

I ran the light over the hole through which the leanansidhe had escaped. “It won’t be easy. People hunt them, so they’re good at hiding. From the look of it, I’d say this one is old, so she’s experienced. Plus, now she’s more dangerous because she’s been discovered.”