11:16 a.m.
Forensic Science Division. Chemical Sciences Section.

White lights.
White walls.
White benches.

Too white.

White enough to look as though no secrets could exist here.

In truth—
the cleanest rooms usually hold the darkest secrets.

Sum Kwok Tong stood at the main analysis station.

Gloves on.
Protective glasses on.
Hands steady.

He was not smelling the scent.

He was dissecting it.

Four sets of samples lay on the bench.

Lin Bing.
Hong Yu.
Tan Xin Yi.
Su Mei Mei.

Four sealed collection tubes.
Four sets of clothing fibers.
Four airborne residue captures.

And—

the nearly invisible contact mark behind Su Mei Mei’s ear.

“Run secondary comparison.”

Sum said it quietly.

The team moved at once.

Spectral analysis.
Chromatographic separation.
Thermal desorption.
Volatile reconstruction.

One instrument after another came alive.
Data streamed in lines.

No one wasted words.

Only the low hum of machines.

Like a room full of cold beasts working in silence.

The SID team was present.

Yong Tin Kei.
Chang Hsin-Yan.
Lee Wai Hing.
Yim Bing.
Tan Chih Lin.
Kim Min Jung.

No one interrupted.

Because this stage would determine what, exactly, they were hunting.

The first results appeared on screen.

Layered molecular spectra unfolded.

Sum pointed to several segments.

“The surface accord is confirmed.”

“The dry green edge of fig leaf.”

“The bright diffusion of orange blossom.”

“The herbal woody support in the middle.”

“And the lingering base—”

He paused.

“White oleander.”

Lee frowned.

“Oleander is toxic.”

“Yes,” Sum said. “But that isn’t the real question.”

“The real question is—why is it here?”

The display zoomed again.

One buried structure was highlighted in red.

“This is not natural perfumery.”

The room stilled.

“What does that mean?” Chang asked.

Sum kept his eyes on the spectrum.

“Natural perfumery values layering, balance, volatility curves.”

“Commercial perfume values recognizability, longevity, cost, and stability.”

“But this—”

He tapped the display.

“Doesn’t care whether it smells beautiful.”

“It only cares whether it can get in.”

No one spoke.

“In where?” Yim Bing asked.

“The nasal cavity.”

“The lungs.”

“The bloodstream.”

“The nervous system.”

By the time he said the last two words, the room felt colder.

“This is not perfume,” Sum said.

“It is a delivery system disguised as perfume.”

Yong Tin Kei’s gaze darkened.

“Delivering what?”

Sum did not answer immediately.

He pulled up a deeper layer of analysis.

Another spectral map overlaid the first.

At last, a deeply buried structural line emerged.

Like a needle
hidden inside flowers.

“This layer is the core.”

“A composite scent structure.”

“The top note attracts.”

“The middle note lingers.”

“The tail note conceals.”

“And the functional molecule—sits between the middle and base, pushed forward under aromatic cover.”

“Like smuggling,” Tan Chih Lin said softly.

“Yes.” Sum nodded. “Like a marching band in front, while the real assassin walks hidden in the middle.”

Chang stared at the line.

“So the person who smells it thinks they only smelled fragrance.”

“But in reality—”

Sum said,

“they already touched the weapon.”

The room sank into silence.

“How many people can do something like this?” Yong asked.

Sum shook his head.

“Very few.”

“Why?”

“Because this is not just chemistry.”

“And not just perfumery.”

“This is overlap between disciplines.”

He projected another model.

Scent diffusion model.
Human absorption model.
Neural response model.

Three layers aligned.

Precise enough to feel cruel.

“The maker must understand—”

“Molecular chemistry.”

“Fragrance engineering.”

“Human physiological response.”

“Volatile release control.”

“And above all—how to hide danger inside beauty.”

“Not something a student could build,” Yim Bing said.

“No,” Sum replied.

“Then what kind of person does?” Lee asked.

Sum was silent for two seconds.

Then:

“A professional-level formulator.”

“More accurately—”

“A weapons chemist.”

The sentence landed heavily.

It pushed the case open another layer.

Yong did not move.

He only asked:

“Do we have a signature?”

Sum looked as if he had been waiting for that.

He brought up a comparative grid.

All four residue structures, lined up side by side.

“Yes.”

“Same hand. Or the same core formulation architecture.”

“How can you tell?” Chang asked.

“Because it has habits.”

“Habits?”

“Yes.”

Sum pointed to the end of the spectral line.

“In a more efficient design, this section would be shorter. Cleaner. Harder to detect.”

“But the maker left it in.”

“An extremely fine delayed tail.”

“Why?” Lee asked.

Sum answered slowly.

“Because he likes completeness.”

“He likes keeping the scent around the body longer.”

“He likes watching it—take effect slowly.”

The room went quiet except for the machines.

Chang’s eyes turned colder.

“Not just a killer.”

“No,” Sum said.

“A creator.”

Those two words chilled the room.

Not impulse.
Not accidental poisoning.
Not random murder.

But—

design.
testing.
correction.
release.

“Can we trace origin?” Yong asked.

“Partially.”

Sum pulled up the ingredient breakdown.

“The synthetic fig-leaf segment is too common.”

“The orange blossom accord can be reproduced by many facilities.”

“But this—”

He tapped a minor stabilizing component.

“This ratio is unusual.”

“What is it?” Tan asked immediately.

“A civilian rewrite of military-grade microencapsulation stabilization.”

“Plain language,” Yim Bing said coldly.

Sum glanced at her.

“It means—”

“This was not originally made for perfume.”

“Then what was it made for?” Kim Min Jung asked.

“Precision release.”

“At specific timing. Specific environments. Specific concentration ranges. Without degrading early.”

Tan’s expression changed.

“Weapon-release architecture.”

“Yes,” Sum said.

Yong spoke at last.

“So someone took a technology designed for weapons engineering and used it to build something that smells like luxury perfume.”

“Not smells like,” Sum corrected.

“It can genuinely be luxury perfume.”

“It just has another function.”

He looked at the cold spectral line.

Tan had already dragged the stabilizer code into the database.

Search.
Cross-check.
Filter.
Eliminate.

Then—

a result appeared.

“Got something.”

Everyone looked at him.

“In the last three years, almost no open-source literature shows this kind of rewritten technology in commercial use.”

“But in black-market transaction records, there are three near-matches.”

“Location,” Yong said.

“Country K.”

The room seemed to drop.

“Buyer?” Yim Bing asked.

“No legal identity attached.”

Tan kept reading.

“But one transaction tag repeats.”

The display enlarged.

S.C.

“A person?” Lee asked.

“Looks like initials,” Chang said.

Yong said nothing.

He stared at the two letters.

S.C.

Song Ching.

The name had not been spoken aloud yet.

But the shadow—

was already in the room.

Sum closed one spectrum and opened the final sample.

The contact trace behind Su Mei Mei’s ear.

Magnified.

A ring of nearly invisible particulates around the skin edge.

Not quite a needle mark.

Closer to—

an ultra-thin contact spray interface that had rested against the skin for a split second.

“This is close-range supplemental release,” he said.

“What does that mean?” Chang asked.

“Airborne diffusion alone does not guarantee stable effect every time.”

“So the maker prepared a second method.”

“Close contact,” Yim Bing said.

“Yes.”

“The scent is the surface.”

“The contact is the point.”

“The surface lures.”

“The point locks.”

No one moved.

Because now they understood—

the enemy did not rely on one method.

He was careful.
Professional.

And worse—

not in a hurry.

“Conclusion,” Yong said.

Sum turned to face them.

Word by word:

“This is a professionally formulated composite scent structure.”

“It possesses weapon-delivery properties.”

“The maker has advanced training in chemistry, fragrance engineering, and release-control systems.”

“And—”

He paused.

“He has done this before.”

The air locked.

Yong slowly straightened.

His eyes had gone hard as metal.

“From this point onward, pull every name connected to this technology.”

“Legal.”

“Illegal.”

“Academic.”

“Military-industrial.”

“Underground market.”

“Especially in Country K.”

Chang stared at the spectral line.

“He isn’t selling scent.”

“He’s writing with it,” Tan said.

Yim Bing added coldly:

“And writing people into death.”

No one argued.

Because it was true.

The lights remained white.

The machines kept turning.

The invisible scent had now been torn apart into cold data across the screens.

And the clearer it became—

the more one thing stood out.

They were not chasing a perfume.

They were chasing—

someone who had fused beauty, poison, control, and technology into one.

And that person—

was still alive.