Lena looked out at the wet runway. "That's the point," she said.

He glanced at her and gave a small nod. "You're right."

The plane accelerated. Lena pressed her head gently to the seat and watched the runway lights draw into lines. When the wheels left the ground, she felt the familiar shift in her stomach. She followed the wing with her eyes and counted slowly until the horizon leveled.

The first hour of the flight was quiet. Lena drank water, ate half a sandwich, and reviewed her robot's code on her tablet. The cabin lights were soft. Marisol read a novel. Captain Cross and First Officer Park alternated updates about the weather ahead.

Marisol's novel was a paperback she had read twice before, a mystery set in a small town where everyone had a reason and nobody had an alibi, and she read it the way she did everything on airplanes: with a pencil, underlining sentences she wanted to remember, because Marisol believed that a book you cannot argue with is not worth finishing. Lena's sandwich was half turkey, half eaten, wrapped in paper that crinkled whenever the plane shifted, and she ate it slowly because her balance disorder had taught her that eating slowly on a moving airplane is not fussiness but strategy: the body, given time, can sort out which signals to trust. Her tablet showed the robot's code, lines she had written and rewritten, with a comment at the top that read # if sensors disagree, stop and ask — a line she had added after the practice-pipe reflection incident, and a line that would, months later, become the centerpiece of her conference presentation. The cabin lights were soft, the way airlines make them soft when they want passengers to feel that nothing is happening, and for an hour, nothing was: no announcements, no turbulence, no decisions. Lena thought about how strange it was that an hour of nothing could feel, after a morning of everything, like a gift. She thought about Mateo, probably at home by now, probably with his own notebook open, probably writing down the times of his calls the way he wrote down everything: in columns, with dates, because a retired investigator's notebook is not a diary but a record, and a record is what you consult when memory starts negotiating. She thought about the seat beneath her — a window seat, over the wing, exactly as the note had requested — and about how a seat, when it is the right seat, disappears. You do not think about a chair that fits. You think about the code, the sandwich, the novel, the light. That disappearance was the whole point of the note, and of the morning's fight for it: not privilege, not victory, but the ordinary luxury of forgetting, for an hour, that your body needs negotiating with at all.

Then the seatbelt sign came on.

"Cabin crew, take your seats," Cross announced. "We're approaching a band of moderate turbulence. Please remain seated with your belts fastened."

The aircraft dipped once, then rose. A cup slid along a tray table. Someone gasped. Lena's inner ear reacted before her thoughts did. The cabin tilted sharply, and nausea rose in her throat. She lowered the tablet and stared at the horizon through the window, but clouds filled the view.

Marisol reached for her hand. "Look at me if the window isn't helping."

Lena had prepared for turbulence with information. She had read explanations of airflow and learned that aircraft wings were designed to flex. She understood that the pilots had procedures and weather data. But knowledge did not persuade her inner ear. When the first jolt passed through the cabin, her body reacted as though gravity had changed its mind. Marisol's hand was there before Lena asked for it, warm and steady against the armrest.

For a while the storm reduced the whole flight to sound: the low engine note, the sharp rattle of a cup, the brief cry of a frightened child. Lena tried to match each sensation to something she knew. Air moving unevenly. A tray left open. A nervous passenger. Yet some movements were too sudden to classify, and she learned to tolerate not knowing exactly which bump would arrive next. She focused on actions: belt secure, feet flat, gaze steady, breathing controlled. The routine was not a cure. It was a way to stay present while the situation changed.