The layer began to seal behind her.
It did not chase her. That was almost worse. It simply stopped being there, deck by deck, section by section, closing up the way water closes, and she ran forward through a corridor that was becoming true and was pursued by a corridor that was becoming real.
Behind her, the ship went from a place to a fact.
She ran. She ran with a burned relay in one hand and the other streaming blood, and her shoulder screaming, and she went up two decks and forward eleven sections, and she did not look back, because Spock had told her not to and because she had understood exactly why.
And because somewhere behind her, in a room she could have reached in ninety seconds, a man was sitting in a chair and being alive.
The transporter room door was open. The pad was lit. And it was lit because Montgomery Scott, four hundred years and one universe away, was holding a circuit open through the field of an object older than the Earth, at nine percent tolerance, and had been holding it for nine minutes and forty seconds, and had begun about a minute ago to bleed from the nose.
She got onto the pad. The world went white.
* *
And the last thing Nyota Uhura heard, in the two-tenths of a second before the transporter took her, coming down the corridor she had just run up, from a very long way away, unmistakable, amused, entirely certain, was a man's voice saying:
"Bones, if you tell me one more time that I don't sleep enough, I am going to have Spock sedate you."
She came apart into light.
And that was the last of it that she would ever have.
Spock had told her, in an observation lounge with the door locked, that he did not know what the return would cost, and that he suspected it would cost something, and that he would not lie to her about the shape of it because he did not know the shape of it. He had been right on all three counts. The layer she had been standing in was not a place and had never been a place. It was a record, a coherent state held under a louder one, and the instant the relay came out of that junction the state resolved and the record closed, and everything that had happened inside it had nowhere left to be. A woman had run down a corridor on deck seven. There was no corridor. There was no hour. There was no woman in it. The forty-one minutes she had lived in there did not become a lie; they became something worse, which is nothing at all, and they took with them, gently and completely, every memory she had of living them.
She did not forget Kirk. She had stood in the Guardian's field when the world turned, and that was hers and would stay hers, all of it, the two years and the empty channel and the wooden bird and six thousand entries written in a hand that got worse toward the end of every session. She kept the loss. She kept the search. She kept the man.
She simply never knew that she was the one who had gone in and got him back.
* *
And behind her, on the deck of the Enterprise, in a corridor on deck seven, a burned relay lay on the floor where nobody had dropped it.
And the universe closed over it.
And there was not so much as a ripple.