Mom held me against her chest, her whole body trembling. She looked down at me, barely conscious in her arms, then back at Dad, who stood there waiting with all the patience of someone reviewing a contract.

"I'll sign," she said.

In the car, I leaned against Mom while Dad drove in silence, the financial news radio program murmuring from the front speakers. When the market was up, the corner of his mouth lifted. When it dipped, his brow tightened.

The daughter burning up on the backseat did not factor into his calculations. As long as I did not die, the investment could still be recovered.

At the hospital, I did not cry when they put the IV in. The nurse smiled and told me I was incredibly brave for not making a peep.

She did not know that I was not brave. I just could not afford to cry. If I had made a sound when the needle went in, it would have cost another hundred dollars, and that was several days of Mom's grocery money.

I watched the IV drip and thought about how each drop was money flowing directly into my veins. I was becoming more and more expensive with every passing minute, and the more expensive I became, the less I felt I deserved to exist.

Dad was right. I was a liability. If I had not gotten sick, those 890 dollars could have gone into something that actually grew in value. It was my fault.

By the time we got home, it was evening and the fever had come down a little, though my head still swam. Dad took the hospital bill and pinned it to the front of the refrigerator in the most visible spot he could find.

"Sandra, remember that this gets paid back. We'll take it out of next month's household budget."

I lay on the couch and stared at the decibel meter on the wall. 25.

The house was as quiet as a graveyard, broken only by the sound of Dad typing at his desk, logging every expense with careful precision. That included the five dollar parking fee at the hospital, which had already been added to my tab.

I reached into my pocket. The coin was still there, the one Aunt Lisa had slipped me, the one that existed nowhere in Dad's ledger. It was my only secret and my only hope.

I let myself wonder, just for a moment, whether one day I could save up enough coins to buy my way out.

I wanted to buy my freedom, the right to cry as loud as I wanted and laugh without watching a number on the wall. However, right now I had one dollar and could not even afford a single scream.

The storm rolled in hard that night, thunder shaking the windows as the decibel meter jumped constantly. 40, 50, 60.

However, this was nature's noise, and Dad had no authority over the weather. He put in his earplugs, shut his bedroom door, and that was that.

Mom had fallen asleep too, worn out from the day of taking care of me and from enduring Dad's criticism all day.

I could not sleep. My arm still ached where the IV had been, and I was thirsty.

Still, I did not dare move. Outside, the thunder swallowed every sound, including the sound of the window being pried open.

It was a soft click, so faint that anyone else would have missed it entirely, but not me. In this house, I had learned to hear everything. My ears were sharper than any five year old's had a right to be.

I opened my eyes and saw a dark shape slide over the windowsill and drop into the room. It was a man, dressed in a black rain jacket, holding a knife. When the lightning flashed, the blade caught the light and glinted pale white.

My heart seized.

It was a burglar. Someone had broken into our house.

The word "help" rose up through my chest and reached my throat. I opened my mouth.

Then I saw the decibel meter. The living room was dark, but that red number was perfectly visible even in the blackness. 35.

If I screamed, the meter would spike well past 100, and the fines would start stacking immediately, a base charge for the outburst, billed per second after that, with an additional fee tacked on for disturbing Dad's sleep.

My account was already in the negative. Mom's household budget for next month had already been wiped out. We could not pay.

The man moved slowly toward the hallway, toward Mom and Dad's bedroom.

Was he going to hurt someone? Or just steal something?

If Dad's hidden savings were stolen, he would lose his mind, and every bit of that rage would land on Mom and me. I could not let that happen.

I had to do something, but I could not make a sound as that would cost money.

I was sweating through my pajamas, my mind racing. My hand found the coin in my pocket, small and cold against my fingers. It was everything I had.

One dollar. It was not enough to buy a piece of candy or a sheet of paper.

However, it could make a tiny bit of noise that stayed under the limit.

The burglar had his hand on the bedroom door handle. The knife was raised.

There was no time left. I took a slow breath, flicked my wrist, and let the coin roll across the floor.

It spun and caught the leg of the coffee table with a bright, clean ring. It was small enough to get lost amidst the lightning. The decibel meter ticked up to 38.

That was under the limit, so there would be no fine.

The burglar froze. He spun around and looked toward the wardrobe in the corner of the living room and, through the narrow gap in the door, we locked eyes. His gaze was cold and mean. He abandoned the bedroom and started walking toward me instead.

He crossed the room one slow step at a time, his shoes landing heavily on the floor.

I pressed both hands over my mouth and dug my nails into my cheeks. I could not scream. I absolutely could not scream.

He reached the wardrobe and yanked the door open.

I was crouched inside, curled into the smallest shape I could make. He looked down at me and smiled, the kind of smile that had nothing kind in it. He had not expected to find a wide-awake child hiding in the dark.

He raised the knife and brought it down toward me.

I shut my eyes and did not move. If I threw myself sideways, I would knock against the wardrobe wall and make noise, and noise meant fines.

The blade went into my stomach, first cold, and then fiery hot. A tearing and burning pain a hundred times worse than the time I broke my arm.

Every instinct I had screamed at me to scream out loud, to let it out, to make some sort of sound that matched what was happening to my body.

I opened my eyes and looked at the decibel meter. 32.

Good. I had not made a sound.

Blood soaked through my pajamas and spread across the floor in a dark pool. The burglar stared at me for a moment, thrown off.

He had probably never stabbed a child who did not make a sound. He must have thought I was mute, or in shock. He pulled the knife out, and the pain came again in fresh waves. My whole body convulsed and I bit clean through my lip, the taste of blood filling my mouth.

Still, I did not make a sound.

He wiped the blade on my sleeve, then turned and went straight for the cabinet across the room. That was where Dad kept his hidden cash, and I watched, unable to do anything, as the burglar pulled out a metal lockbox.

It held everything Dad valued most, cash and valuables, and the burglar emptied it into his backpack, zipped it shut, and left the same way he had come in, over the windowsill and out into the rain.

The room went quiet again. There was only the thunder outside and the quiet, steady drip of blood hitting the floor.

The decibel meter read 29.

It was quiet enough. Mom and Dad were still asleep, so neither of them had been disturbed. Neither of them had been frightened.

I had done well. I was a good girl. The most cost-effective child there was.

My vision was going blurry at the edges and the cold feeling was spreading through my body slowly, the way it does when something is running out. I felt like a balloon with a hole in it, something essential leaking out with no way to stop it.

I looked at the coin on the floor. It lay still in the middle of a dark red puddle, catching what little light there was.

It was a shame, really. It had been enough to buy one small sound, one tiny distraction, but it was not enough to buy a hug from Dad, or tears from Mom, or my life.

I let my eyes close. I looked at the decibel meter one last time. 28.

Perfect.

I had slipped away without causing any trouble at all.

Dad would be proud of me. Right?