Chapter 39: The Next Generation
Two years after Stockholm, the world was different.
The Mirror Protocol had been adopted by every major AI lab on the planet. Not because it was mandatory—Dojun had fought against regulation, arguing that trust worked better than force—but because it worked. AI systems built with the Mirror Protocol were more capable, more reliable, and more trusted by the public than those without it.
Aether, the AI they’d built at Prometheus Labs, had helped cure three diseases, designed a carbon capture system that actually worked at scale, and taught itself to play a passable game of Go—which it then deliberately lost to Dojun Junior, because the Mirror Protocol had taught it that sometimes letting a three-year-old win was more important than optimal play.
“Your AI has a sense of humor,” Hana observed after the Go incident.
“It has human values,” Dojun corrected. “Humor is just values applied to timing.”
NexGen AI was now worth $47 billion. Dojun had stepped down as CEO, handing the reins to Minji—the quiet, brilliant engineer who could find bugs in code that God had declared flawless. She was twenty-five, terrifyingly competent, and already being called the most important tech leader in Korea.
Dojun’s new title was “Founder and Chief Worrier,” which Jihoon had proposed and the board had accepted because no one could think of a better one.
He spent his days at Prometheus Labs, working with Baek on the next iteration of the Containment Theorem. Not because the first version wasn’t working—it was—but because Dojun was a programmer, and programmers never stopped optimizing.
He spent his evenings at home, building block towers and reading bedtime stories and teaching his son that the most important things in life couldn’t be coded.
And once a month, he met Yuki for coffee at the same bench by Han River Park where they’d first sat down together. They’d talk about the old timeline—carefully, in coded language, never saying the word “regression” aloud. They’d compare notes on how this timeline was diverging from the one they remembered. They’d wonder, sometimes, why they’d been given a second chance.
“Do you ever think about it?” Yuki asked one spring morning. Cherry blossoms drifted past them like pink snow. “The other timeline. The one where we died.”
“Every day.”
“Does it get easier?”
“No. But it gets smaller. Like a photograph in your wallet. You carry it everywhere, but it doesn’t take up the whole room anymore.”
Yuki sipped her coffee. “I met someone. A historian at Yonsei University. He studies technology and society.” She smiled. “He has no idea about any of this. He just likes that I understand math and laugh at his jokes.”
“That’s wonderful, Yuki.”
“I think I might tell him. Someday. Not the regression—just the parts that matter. That I’ve seen things that scared me. That I chose to build something instead of running. That I’m not as calm as I look.”
“No one is as calm as you look.”
She laughed. The cherry blossoms kept falling.
That evening, Dojun came home to find Hana and Junior in the living room. Junior was four now, old enough to be curious about everything and young enough to be satisfied with terrible answers.
“Daddy, what do you do at work?”
“I make computers think.”
“Can they think about dinosaurs?”
“They can think about anything.”
“Even why the sky is blue?”
“Especially why the sky is blue.”
Junior considered this. Then: “Can they think about why Mommy’s cookies taste better than yours?”
Hana burst out laughing. Dojun put his hand over his heart in mock offense.
“That,” he said, “is a problem beyond even artificial intelligence.”
Later, after Junior was asleep and the house was quiet, Dojun sat in his study. Not working. Just sitting. Looking at the framed photo on his desk: the Nobel ceremony, three laureates and a toddler, surrounded by people who had helped them save a world they couldn’t tell anyone about.
His phone buzzed. Baek.
Dojun. I’ve been thinking about the next generation. Not of the Mirror Protocol. Of us. The regressors. What happens when we’re gone? Who carries the knowledge?
Dojun typed back: We write it down. All of it. Not the regression—the lessons. What we learned about building things that don’t break. About trusting people. About second chances.
Baek: A book?
Dojun: A protocol. Not for machines. For humans. A Mirror Protocol for the next generation of builders.
Baek: That sounds like the work of a lifetime.
Dojun smiled at his phone. Good thing I’ve had two.