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. She went up two decks and forward nine 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, three 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. He 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 warned her that the return might cost something. The instant the relay came out, the dead layer resolved and the eleven minutes she had lived inside it lost any place to exist. She kept Kirk, the two years of loss, the wooden bird, and the archive. She lost only the memory that she had been the one who went in and brought him back.
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, the empty channel, the wooden bird, six hundred 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.