“Do you hear that?” Sano whispered.

His men nodded, their faces grim because they recognized the sound from previous, similar missions. They roved the compound, trying to locate its source. Sano pointed to a small storehouse with a tile roof and thick plaster walls. Inoue yanked on the ironclad door.

As it swung open, the sound intensified. Sano discerned voices chanting and drums beating; cries, moans, and a familiar, pungent odor of incense drifted into the night. He peered inside the storehouse. In the center of the bare wood floor, a ladder extended down a square hole from which arose smoke, flickering light, and the noise.

“We’re going down there,” Sano said.

Eight of his men plunged into the hole to scout the way. Sano clambered down the ladder, his other men following, into a dank, earthy-smelling shaft. The chanting, drumming, and cries enveloped them. At its bottom they crowded into a cellar illuminated by a glow that filtered through a curtained doorway. From this emanated the noise, deafening now. Sano hastened to the doorway and lifted the curtain. In a cavernous room hollowed out of the earth, women wearing red kimonos danced in frenetic gyrations, waving black-beaded rosaries. Men dressed in gray monks’ robes, their heads shaved, beat drums as they cavorted around the room. On the floor, countless naked people writhed and embraced in sexual orgy. Wails of rapture or pain rose from couples and groups of various shapes, ages, and erotic combinations. Along the far wall, hundreds of candles flared amid hundreds of smoking incense burners on an altar beneath a mural that depicted a huge black flower.

The cavern was a secret Black Lotus temple. The orgy was one of the sect’s rituals.

“Praise the glory of the Black Lotus!” chanted the drummers and dancers.

Disgusted at the obscene spectacle, Sano stepped into the temple with his detectives. The outlaws were so caught up in their drumming, chanting, and sexual hysteria that they didn’t notice the intrusion. Among them strode their priest, a tall man who wore a glittering brocade stole over his saffron robes and held a flaming torch. His eyes were closed, but his bare feet wove deftly through the orgy. His bold-hewn features wore an expression of unnatural serenity. His lips formed soundless words; ash and sparks from his torch scattered on his congregation.

Sano inhaled a deep breath, then roared, “Stop!”

Dancers faltered to a standstill. The drumming pattered into silence as the monks froze. The mass of humanity on the floor ceased squirming. Its cries and wails faded. The priest paused midstep; his eyes opened. Everyone gazed in consternation at Sano, his troops, and their upraised swords. The cavern amplified the hiss of inhaled breath.

“This temple is condemned,” Sano said. “You’re all under arrest for practicing an illegal religion.”

The naked orgiasts leapt to their feet and surged toward the door, heedless of the detectives’ weapons: They knew that the punishment for their crime was execution, and they would risk injury to escape. The men bellowed and the women screamed. Hot, moist flesh hurled up against Sano. The detectives seized dancers and drummers, who kicked and fought. Sano looked around for the priest. Beyond the tumult, he saw the flash of a brocade stole disappearing through a doorway. Shoving his way past thrashing bodies, he plunged through the door and found the priest scrambling up a ladder. Sano grabbed the priest by the ankles and jerked. The priest came toppling down on Sano. They fell together.

“The Black Lotus will triumph over the faithless!” the priest shouted, punching Sano. “They who attack us will die!”

Blows pummeled Sano’s face while he tried to shield it. He heaved upward and rolled the priest under him. The weight of his armor-clad body flattened the priest. Sano pinned the priest’s arms over his head. In the light from the temple, where noisy chaos still raged, Sano beheld the face of his captive.

Eyes with pupils dilated so large that there seemed no color surrounding them glared fiercely back at Sano. They were so black, like he could see out of them, but I couldn’t see in, he recalled Yuka saying. This was the man who had pulled her daughter, Mariko, into the darkness of the Black Lotus sect.

Was he also the Dragon King?

“Who are you?” Sano shouted into the priest’s face. “Tell me your name!”

The priest snarled, baring broken, sharp-edged teeth. “I am Profound Wisdom, lord of cosmic forces that will destroy you and all your fellow nonbelievers.”

Amazement silenced Sano. He had found the Black Lotus priest and secret temple he’d sought at the beginning of the investigation.

Sano’s troops had overpowered the Black Lotus worshipers. Two monks had committed suicide to avoid capture. Four people had been trampled to death while trying to escape. Sano had sent most of his men to take the remaining Black Lotus members to Edo Jail and notify Ginza officials about the raid. Now he and two detectives stood in a chamber at the inn, where they’d brought Profound Wisdom for interrogation.

The priest knelt beneath a lantern suspended from the ceiling. His hair was rumpled, dirt streaked his perspiring skin and dimmed the glitter of his stole, but his upright posture exuded insolence. The unnatural serenity masked his emotions. His fathomless black eyes watched Sano, who paced around him while one detective blocked the door and the other leaned against the barred window. Outside, torches flared and figures moved in the yard as local officials came to inspect the clandestine temple that had operated under their noses.

“Did you kidnap the shogun’s mother?” Sano said.

He forced himself to be civil, though the priest’s demeanor stoked his hatred for the Black Lotus. Captured sect members relished goading authorities into physical violence that would allow them to test their faith and demonstrate their spiritual superiority. Sano knew that if he got into a fight with Profound Wisdom, he was capable of killing the priest, a collaborator in the enslavement, torture, and murder of countless innocent people. If he killed Profound Wisdom, he might never get the information that would help him save Reiko.

Scorn rippled the surface of Profound Wisdom’s serene facade. “If I did kidnap Lady Keisho-in, I would not tell you.” He had an odd, deep, resonant voice, as if his throat were made of iron instead of flesh. “My spirit is mighty. You won’t wring a confession out of me.”

Sano controlled his impatience. He recognized Profound Wisdom as one of the Black Lotus’s true zealots-armed with the courage of his faith, resistant to coercion. “Then suppose we just talk about your followers,” Sano said.

“I’ll not reveal the identities of the Black Lotus faithful who are still at liberty.” Profound Wisdom sat unmoving as Sano continued to circle him. “Torture me, kill me, but I won’t betray my people and send them to their death.”

“I’m not interested in making a martyr out of you,” Sano said. “And the only follower I want to know about is already dead. She died in the massacre of Lady Keisho-in’s entourage. Her name was Mariko.”

“I don’t know any Mariko,” the priest said.

His indifferent tone and manner would have fooled Sano, had he not known that Profound Wisdom was lying. Sano said, “She joined the Black Lotus two years ago.” When her mother had told him about Mariko’s changed personality and mysterious absences, Sano had recognized the behavior of youngsters lured into the sect. “She’s been seen with you.”

“Many people come to me,” Profound Wisdom said. “So many that it is impossible for me to know them all.”

“She was at the Black Lotus Temple during the disaster,” Sano said. This explained why Mariko had returned home wounded, bloody, and hysterical that night. “She was one of the few survivors who escaped. And she was your mistress. You fathered her child.”