I had been a bride of the marquis's house for three days.
By daylight I was a pitiable widow-to-be.
Pale grey robes, a soft voice, the occasional dab of a handkerchief at the corner of my eye where the servants could see — the very picture of a country girl wed by mistake to a dying man, heartsick and too meek to complain.
The acting was easy.
I'd grown up in an apothecary, watching people weep over fathers and mothers. I'd learned it all by osmosis.
Night was when I did my real work.
The door barred, the curtains down, the lamps turned low to a single flame.
Xie Zhan would sit on the couch, roll back his sleeve, and offer me his wrist as if it were a custom years old.
I didn't stand on ceremony. I dragged a chair up across from him and set my fingers to his pulse.
"Three days now," I said as I read. "And you still haven't let me see my father."
"It isn't time yet."
"You tell me the poisoner came to Huichun Hall. You tell me my father may be hiding something. Then you shut me up in this estate and won't let me go home to ask him a single question." I looked up. "Xie Zhan — are you guarding against me too?"
He looked at me, one corner of his mouth lifting.
"If I were guarding against you, I wouldn't hand you my wrist in the dark every night."
There was sense in that.
A man afraid of me would not let me lay my fingers on his pulse in a dark room, the two of us alone.
"Then why me?" I asked outright. "The capital is thick with physicians. You said you needed someone outside the imperial college — I'm hardly the only one."
Xie Zhan was quiet a while.
Then he said, plainly, without any dressing:
"Three months ago, I didn't know a person named Ye Qing existed."
My fingers went still.
"I've been poisoned half a year. The imperial physicians came in turns — a dozen of them — and not one could put a name to it. Some told me it was overwork. A sickness of the heart." His mouth quirked. "I knew I'd been poisoned. But I needed proof — someone who could touch my wrist and say aloud what a dozen court physicians couldn't see."
"I traced the antidote herb. In all the capital only two places hold it: the imperial pharmacy inside the palace, and your father's Huichun Hall."
He looked at me.
"I sent a man to Huichun Hall dressed as a patient, and let your father read his pulse. Your father found nothing. But his daughter, standing behind the counter, took one glance at the man's face and said: 'This one's pulse carries a cold thread. It's no common ailment. A little shop like ours can't treat it.'"
I remembered that patient.
I remembered saying exactly those words.
"A thread of ice," Xie Zhan said. "In the whole capital, you are the only soul who could name it. I didn't choose you because you're an apothecary's daughter. I chose you because you're the only person alive who can see the thing that's killing me."
I sat still for a long time.
So it wasn't fate after all.
Not a man who'd carried me quietly in his heart for years, not the hand of Heaven bending two lives together.
He had gone looking for a scalpel that fit his hand.
And the scalpel, as it happened, was me.
Strange — that cold explanation steadied me more than any tender one would have.
I would rather be a blade worth something than a piece someone pitied.
"Fine," I said, drawing my hand back. "Then let me tell you about the thing that's killing you."
"This poison is called Ice Silkworm. It's recorded in my family's case-books. It doesn't kill in a single stroke — it's raised inside a body the way you raise a silkworm, spinning out one cold thread a day, winding it slowly around the organs. By the time the thread has wrapped the heart, the man stops breathing in his sleep, his face peaceful as if he'd died of old age. No one suspects a thing."
"Which is why Ice Silkworm is the weapon of a killer who wants a death with no marks. Who wants the whole world to believe you died of illness — died of fate."
Xie Zhan listened, his eyes going deep.
"How long," he asked. "How long do I have?"
That was the question he'd truly been circling.
And I realized — he didn't know.
This man who knew everything, who had laid out this entire board, did not know how long he himself had left to live.
"I can't be sure," I answered honestly. "Ice Silkworm feeds on cold. The colder it gets, the faster it spins. And if someone were deliberately pushing it along —"
I didn't finish.
Xie Zhan's brows suddenly drew together.
The hand resting on his knee clenched tight.
His face, already pale, went white in an instant — not a drop of blood left in it.
"Xie Zhan?"
He didn't answer.
He folded forward, one hand pressed to his chest, his breath breaking apart, each rasp coming out as if a fist had closed on his throat.
I lunged to take his pulse.
The thread of ice — the fine cold strand of a moment ago — had thickened many times over in that instant, coiling and cinching around the heart-vessel, so cold it stung my fingertips.
Wrong.
This morning the pulse had been steady. It couldn't flare this fast.
Not unless someone had fed fresh cold into him tonight.
"What did you eat tonight? Drink? Is there anything unusual in this room?" I fired the questions off, already pulling the case of needles from my sleeve.
He couldn't answer. His glazed eyes rolled once and came to rest on the corner of the room — the bronze incense burner, quietly breathing out a thin ribbon of smoke.
Then he collapsed onto the couch, his lips going blue.
I had no time left for fear.
I tore the robe open at his chest, felt out the points with three fingers, and drove the needles in one after another — Danzhong, Jiuwei, Neiguan — forcing every scrap of warmth in his body back up, damming the cold thread before it could close over his heart.
The fourth needle went in. I gritted my teeth and gave it half a turn.
Xie Zhan coughed once and brought up a mouthful of black blood.
Black blood — the poison, forced out.
He was breathing.
I let out a breath. The whole back of my robe was soaked through with sweat.
But I didn't let myself sit still.
I stood and went straight to the incense burner in the corner — the one thing he'd had strength enough to look at.
I scraped a pinch of ash into my palm and lifted it to my nose.
Agarwood. Spikenard. And beneath them, faint enough to be nothing at all, a thin, cold, slightly fishy note.
I rubbed the ash between two fingers.
There it was.
A medicine of extreme cold nature, ground fine and blended into the incense. Burned, it changed neither the smell nor the smoke. But anyone sitting in the room, breathing it in day after day, was swallowing ice.
To an ordinary person it would mean, at worst, a chilled belly for a few days. But to a man carrying Ice Silkworm in his veins, every curl of smoke was the crack of a whip, driving the silkworm to spin.
I turned back to look at him.
It was a long while before he opened his eyes.
His gaze fixed on the canopy overhead, empty, then slowly drew back into focus.
"...It wasn't him," he murmured, his voice still shaking. "Food and drink, I guard against all of it. I changed my taster to a man I trust with my life. The physicians' decoction, I've never swallowed a drop."
His eyes went to the ash in my hand.
"Only the incense — I never guarded the incense. It's burned every day this half-year. I grew so used to it I... forgot that smoke can kill a man too."
He turned to me, and for the first time there was something in his eyes close to bewilderment.
"He poisoned me under my own nose. For half a year. And I was watching the wrong man."
I understood him.
Meaning: the one he'd suspected was not the killer.
Meaning: half a year of scheming, and he had calculated wrong.
The one who truly wanted him dead was still standing somewhere in this estate, watching him struggle in perfect calm — and I didn't even know his face.
I gathered up the needles, wiped the black blood from the corner of his mouth, my hand still not quite steady.
As I was folding the needles back into their case, the lamplight slid across the mouthful of black blood on the cloth.
I stopped.
Ice Silkworm blood, when forced out, ought to be black shot with green.
But this stain — through the black ran a very faint thread of red, as if something else had been mixed in.
I had seen that color of blood before.
Once.
In an old case-record at Huichun Hall — the one my father kept locked at the bottom of a chest, and never in his life let me read.
