Missa

Missa turned around and looked at him. She did not check a pocket, touch a hidden card, or glance at the ceiling.

"The digit you crossed out," Missa said calmly, "is a two."

Toby blinked twice. He looked down at his yellow page, where a thick black scribble hid a numeral two.

"You saw," Toby whispered.

"My back was toward you the entire time," Missa said.

"Then you heard the pen strokes."

"A marker doesn't sound like a two, Toby. It just sounds like wet felt on cheap paper."

A low murmur rippled across the folding chairs as kids sat up straight. They leaned in, whispering theories about hidden mirrors and secret earpieces.

The trick was not about mind-reading, and it certainly was not about mirrors. It belonged entirely to the strange, faithful nature of the number nine. When any whole number is multiplied by nine, its digit sum—the total of all its digits added together—is always a multiple of nine. If you multiply twelve by nine, you get one hundred and eight. Add those digits together: one plus zero plus eight makes nine. If you multiply fifty-four by nine, you get four hundred and eighty-six. Add those digits: four plus eight plus six makes eighteen, which also adds up to nine. The rule never wavered, and it never made exceptions.

Because the total sum had to hit a multiple of nine, a missing digit was never truly invisible. Missa only had to add whatever digits Toby had spoken aloud. He had given her four, one, and two. Four plus one plus two made seven. Seven was two steps away from nine, the nearest target. That meant the missing number had to be two, because nothing else could bridge the distance.

"The digit isn't gone," Missa told the cafeteria, handing Toby a clean piece of paper. "It just left a gap behind. And a gap always tells you what was there."

Missa understood gaps because she had lived inside one for years. Back when she worked stage crew at the old downtown civic playhouse, nobody seemed to notice her arrival or departure. She had been fourteen, thin as a rail, and perpetually dressed in black cotton jeans and faded sneakers. Her job was hauling sandbags, winding heavy cables, and taping down frayed audio wires. She worked quickly, moved quietly, and made almost no noise. The problem with being quiet was that people treated silence like an empty chair.

In the annual cast photograph, Missa ended up on the extreme left margin. When the director printed the program, the cropping tool sheared off her left shoulder and her name. On Friday nights, the stage manager called the roll for dinner breaks and regularly stopped at thirteen.

"Wait, were you here the whole time?" the older actors would ask, blinking over their paper plates.

Each time it happened, a small, cold knot tightened behind her ribs. She began to feel like a stray zero in an equation. She was present in the room, but nobody ever added her into the final count.

Marlow had been the first person to notice the subtraction. Marlow was the head rigger, a broad-shouldered man who smelled of wintergreen tobacco and damp wool. One rainy Tuesday, during technical rehearsals for an amateur production of The Crucible, Missa sat alone on a wooden cable spool. The cast had gone down the street for sandwiches without mentioning the trip to her. Marlow walked over, dragged an empty milk crate across the concrete, and sat down opposite her. He did not offer a useless apology, and he did not tell her to cheer up. Instead, he reached into his canvas vest and pulled out a yellow carpenter's pencil. He picked up a white scrap of drywall from the floor and scribbled a long number across it.

"Look here," Marlow said, tapping the scrap with the flat lead. "I multiplied seventy-three by nine and got six hundred and fifty-seven. Now I blot out the five."

He smeared his thumb across the middle digit until it was a gray smudge.

"A tourist looks at that drywall and thinks the five is lost," Marlow said. "They think the smudge is nothing. But what do six and seven make when you put them together?"

"Thirteen," Missa said quietly.

"And what is the next multiple of nine past thirteen?"

"Eighteen."

"How far is thirteen from eighteen?" Marlow asked, watching her face.

"Five," she answered.

"Right on the nose," Marlow said, tossing the drywall into her lap. "The smudge doesn't mean the number disappeared. The remaining digits are shouting its name across the gap."

Marlow dusted off his canvas knees and stood up.

"You feel like you got skipped on the call sheet," he added before turning back to the lighting grid. "Just remember this. A real gap is an address, kid. You just have to know how to add."

The gym cleared out rapidly once the assembly bell rang. Chairs scraped across the floor, sneakers squeaked toward the double doors, and the chatter faded into the hallway. Only one student remained behind. He stood by the stack of wrestling mats in the corner, holding his canvas binder against his chest.

His name was Leo, and Missa had watched him during the performance. He had not cheered with the others, but he had not looked away either. His eyes had followed every movement of the marker with intense, guarded focus.

"Show is over, Leo," Missa said, unscrewing the cap of a water bottle. "Buses leave in ten minutes."

Leo took two cautious steps forward, letting his binder drop to his side. "You had an accomplice," Leo said, his voice flat with forced confidence.

Missa raised an eyebrow. "An accomplice?"

"Toby. You two practiced that before fifth period."

"I have never spoken to Toby in my life," Missa said, packing her marker into her canvas satchel.

"Then you probably won't even care if I say the whole thing is fake," Leo muttered. He dropped his gaze to the scuffed toes of his boots. "People only show tricks to the popular kids anyway."

The words were sharp, but the tone behind them was brittle and tired. Missa stopped packing. She recognized that particular slump of the shoulders. It was the posture of someone who expected to be cropped out of every picture before the shutter even clicked.

"Sit down, Leo," Missa said, pulling out two folding chairs. "I don't need an accomplice, and Toby definitely didn't practice with me. I'll show you."

Leo hesitated, his hands buried deep in his jacket pockets, before dragging a chair toward the table. Missa tore a blank sheet from her legal pad and slid it across the wood.

"You are the mind reader this time," Missa told him. "I'll do the grunt work."

Leo frowned suspiciously. "I am terrible at math. My teacher literally wrote needs focus on my midterm."

"This isn't school math," Missa said, writing out a clean row of digits. "This is tracking footprints."

She wrote down three, one, and two. Beside them, she drew a bold question mark inside an empty square.

"I multiplied a secret number by nine," Missa explained. "The answer has four digits." She pointed at the paper with the back of her pen. "I hid one of the digits inside that square. The other three numbers are right in front of you."

Leo leaned over the paper, squinting as if searching for tiny pencil marks. "Three, one, and two," Leo read aloud.

"Add them up," Missa said.

"Three plus one is four. Plus two is six."

"Good," Missa said. "Now think about your multiples of nine. What is the next multiple past six?"

"Nine," Leo said, looking up with genuine confusion.

"How far is six from nine?"

"Three." Leo paused, his mouth twitching as the wheels turned behind his eyes. He tapped his index finger against the square with the question mark. "Is it a three?"

"Lift the paper and see," Missa said.

Leo flipped the sheet. Underneath, written on the cardboard backing, was a bold black numeral three. Leo let out a breath he seemed to have held since lunch.

"Wait," he said, leaning both elbows on the table. "Do that again. Give me a harder one."

Missa wrote down a five-digit number: five, eight, three, and four, with a blank circle in the center. "Take your time," she said.