Thomas Black did not speak for several seconds after Petra finished talking.
The council chamber remained silent except for the slow drift of lanterns across the vaulted ceiling. Petra stood rigidly, the brass key still resting in her palm as though it weighed more than metal should.
Councilor Virell finally broke the silence.
"You expect us to believe," he said carefully, "that Alabaster Kane intended to transfer the largest concentration of magical inheritance in the city… to his apprentice?"
Petra's eyes lowered.
"I don't know what he intended," she said quietly. "I only know what he told me."
Black stepped closer.
"When exactly did he give you the key?"
"The night before the celebration."
"Where?"
"In his study."
"What were his exact words?"
Petra hesitated.
Black waited.
Eventually she spoke.
"He said the family believed the inheritance grid was meant to preserve their power," she said. "But that the city could not survive if magic remained trapped inside bloodlines."
Black watched her carefully.
"And he trusted you with that belief?"
"I think… he trusted me with a responsibility."
Councilor Virell folded his arms.
"Alabaster Kane was many things," he said. "But he was not sentimental."
Petra didn't argue.
Black reached out.
"May I see the key?"
She handed it over.
It was small, made of aged brass, with a narrow shaft and a circular head etched with faint glyph markings.
Black turned it slowly between his fingers.
"This isn't a standard estate key," he murmured.
"No," Petra said. "It isn't."
Councilor Virell stepped closer.
"What does it open?"
Petra shook her head.
"He never told me."
Black studied the glyphs carefully.
They were subtle, worn down with time, but still readable.
Containment. Restriction. Authorization.
A vault key.
Black looked up.
"Alabaster didn't give you this to open a door," he said.
"What do you mean?"
"He gave it to you to access something he didn't want anyone else touching."
Virell's gaze sharpened.
"A vault?"
Black nodded.
"Most likely one protected by the estate's deeper magical wards."
Petra frowned.
"But I lived there for years. I never saw-"
"Of course you didn't," Black interrupted gently.
"Vaults are rarely placed where apprentices can see them."
Virell looked toward the windows.
"If such a vault exists," he said slowly, "then whatever it contains may explain the inheritance anomalies."
Black closed his hand around the key.
"Then we should stop talking about it."
Petra looked up.
"And start looking?"
Black nodded once.
"Yes."
The Kane estate looked different at night.
Fog clung low across the gardens, wrapping the stone pathways in pale gray ribbons. Lanterns flickered along the front drive, their magical glow dimmed by the damp air. Black stepped out of the carriage first.
Petra followed, pulling her coat tighter around her shoulders.
Councilor Virell remained inside the carriage.
"I will observe from here," he said.
Black glanced back.
"Afraid of ghosts?"
"Afraid of political complications."
Black gave a small shrug.
"Suit yourself."
The carriage door shut.
Black turned toward the towering estate.
Even in darkness, it radiated quiet authority.
A monument to lineage.
Petra walked beside him up the stone steps.
"You don't believe me," she said suddenly.
Black didn't answer immediately.
Instead he opened the front door with his usual key and stepped inside the quiet entry hall.
The estate smelled faintly of old paper and cooling wards.
Finally he spoke.
"I believe Alabaster Kane was a careful man."
Petra waited.
"And careful men do not entrust the future of their greatest creation to someone without reason."
She looked relieved.
Black continued walking.
"But belief," he said, "is not evidence."
Petra nodded slowly.
"That's fair."
They moved deeper into the house. The halls were dim, most of the staff already asleep. Their footsteps echoed softly against the polished floors.
"Where would he hide a vault?" Petra asked.
Black stopped at the base of the central staircase.
"Not where his family could easily reach it."
"Then where?"
Black's eyes drifted toward the far end of the hall.
"The workshop."
Petra's eyebrows rose.
"The lower laboratory?"
Black nodded.
"The one place everyone assumes is already dangerous enough to avoid."
They descended the narrow stairwell beneath the estate.
The air grew cooler with each step.
Petra held a small lantern as they reached the laboratory door.
Black paused.
"You lived here," he said. "Did Alabaster ever forbid you from entering certain sections?"
Petra thought for a moment.
"Only one."
"Which?"
She pointed to the far wall of the workshop.
A tall stone section carved with faint sigils.
"I always assumed it was just reinforcement magic."
Black stepped closer.
The sigils were subtle, layered beneath ordinary warding runes.
Concealment magic.
He placed his hand against the stone.
"Of course," he murmured.
"What?"
"A door disguised as a wall."
Petra's lantern flickered as she stepped closer.
"You're serious?"
Black nodded.
"Very."
He pulled the brass key from his pocket.
Petra held her breath.
Black studied the wall carefully until he found it, a narrow keyhole hidden between two glyph seams.
He inserted the key.
For a moment, nothing happened. Then the stone wall hummed. Soft blue light rippled through the sigils like water beneath glass.
Petra gasped as the wall slowly shifted aside.
Behind it was a narrow chamber. Cold. Silent. And filled with old magic.
Black stepped inside first.
Shelves lined the walls, stacked with scrolls, crystal plates, and several small metal boxes sealed with arcane locks.
Petra followed, lantern trembling slightly.
"What is all this?"
Black walked slowly across the chamber.
"Documentation."
"Of what?"
He lifted one of the scrolls and unrolled it.
Glyph diagrams. Inheritance flows. Distribution networks.
Petra leaned closer.
"These are grid schematics."
"Yes."
"But… these aren't the same as the public designs."
Black's eyes moved quickly across the page.
"No," he said quietly.
"They're not."
He pointed to a cluster of symbols near the southern wards.
"Look here."
Petra frowned.
"The southern anchors…"
"They're connected."
Her eyes widened.
"But that's impossible. The council said integration was scheduled next year."
Black rolled the scroll slowly.
"Apparently Alabaster disagreed."
Petra looked around the chamber again.
"So he finished the system himself?"
"Possibly."
Black stepped toward the far end of the vault.
There was a large stone pedestal there.
Empty.
Black stopped.
Petra noticed immediately.
"What's wrong?"
He didn't answer at first.
Instead he examined the pedestal carefully.
A circular indentation had been carved into its surface. Exactly the size of a siphon plate.
Black's voice was quiet.
"This pedestal used to hold something."
Petra swallowed.
"The master plate?"
Black nodded slowly.
"The central control device."
Her lantern trembled slightly.
"But… it's gone."
Black crouched beside the pedestal.
The dust pattern around it was disturbed.
Recently.
He stood again.
"How recently?" Petra asked.
Black studied the faint marks carefully.
Then he spoke the words neither of them wanted to hear.
"Within the last twenty-four hours."
Petra felt the blood drain from her face.
"You mean…"
Black turned toward the vault entrance.
"Yes."
His voice was calm.
Too calm.
"Someone knew about this room."
Petra's whisper was barely audible.
"But how?"
Black's eyes darkened.
"That," he said quietly,
"is exactly what we're about to find out."
Behind them, somewhere deeper in the estate, a floorboard creaked.
Black's head snapped toward the sound.
Petra froze.
Neither of them moved.
The vault door slowly began to slide shut behind them.
And from the darkness of the laboratory—
Footsteps approached.