The colony ship Threshold had been designed for 2,000 passengers and a journey of 120 years to the Proxima system. It had been traveling for 94 years when the reactor began to fail—not dramatically, not with an explosion or a loss of pressure or any of the catastrophic failures that the training simulations had prepared the crew for, but slowly, quietly, in the way that things fail when they are very old and very far from anyone who could help them.
Chief Engineer Yuki Okada stood in Reactor Chamber 4, watching the containment field fluctuate on her monitor. The failure was slow—a gradual degradation of the magnetic bearings that kept the plasma from touching the chamber walls, a wearing down of components that had been engineered to last 150 years but that had been running at 95% capacity for nearly a century because the earlier parts of the journey had required more power than the original projections had estimated. She had identified the problem eighteen months ago. She had filed three maintenance requests. All three had been denied due to resource allocation priorities that prioritized the comfort and safety of the passengers in cryo over the maintenance of systems that were, according to the ship’s AI, still within acceptable parameters.
“How long?” asked Captain Diallo, who had appeared behind her without announcement, his presence announced only by the displacement of air in a room that was usually perfectly still.
“The field will hold for another six months if we’re lucky. If we’re not—if there’s a power surge, or a minor seismic event, or any of the thousand small perturbations that occur on a ship this size—the failure could be catastrophic. We’re looking at a breach within six weeks.”
“Can we repair it?”
“With what? The spare bearing assemblies were cannibalized during the third decade of the voyage to repair Reactor Chambers 1 and 2. We have no manufacturing capability for new ones—we have basic fabrication tools, but not the precision equipment required for magnetic containment components. We have one option, and it’s not good: we can redistribute the plasma across all four reactor chambers to reduce the load on Chamber 4, which buys us perhaps three additional months and cripples our propulsion capability by 30%.”
Diallo was quiet. He was a man who had been trained for crisis management, who had spent fifteen years studying historical examples of shipboard emergencies and theoretical responses, but training and reality were different countries, and no amount of study had prepared him for the specific weight of responsibility that came with 2,000 lives in cryo and a ship that was dying by degrees.
“If we redistribute the plasma,” he said, “we don’t reach Proxima. The trajectory calculation is clear—at 70% propulsion, we miss the target system by approximately 4.3 light-years. We will spend the rest of our lives, whatever that means for the passengers in cryo, drifting in interstellar space.”
“We don’t reach Proxima anyway. At current trajectory, with propulsion at 70%, the ship will miss the target system by approximately 4.3 light-years. We will spend the rest of our lives—whatever that means for the passengers in cryo—drifting in interstellar space.”
“What is the alternative?”
“We do nothing. The reactor fails in six weeks. The resulting explosion destroys the ship’s propulsion section entirely. The 2,000 people in cryo freeze to death as the temperature regulation systems collapse over a period of days. The ship becomes a tomb, drifting forever toward nothing, carrying the remains of people who believed they were going to a new world.”
“Those are our options? Slow death or fast death?”
“Those are the options that involve physics as we understand it. There may be others we haven’t considered. But I need time to consider them, and the reactor is not giving us time.”
Diallo looked at the reactor monitor. The plasma inside the containment field glowed a pale blue—a miniature star, tamed and controlled, the most complex technology humanity had ever built, and still subject to the indifferent laws of entropy and material fatigue. The ship was 94 years old. Everything on it was slowly failing. The only question was what would fail first.
“The passengers,” Diallo said quietly. “They trusted us. They went to sleep ninety-four years ago, believing that they would wake up in a new world. They believed that the people running the ship would figure it out. That was the deal. That’s the only reason they got in the pods.”
“We haven’t figured it out.”
“No. But we’ve survived this long. Ninety-four years. Four generation shifts. We’ve kept the ship running. We’ve kept them alive. We’ve done everything right up to this point.” He turned from the reactor chamber. “Hold the field as long as you can. I’m calling a ship-wide assembly. Everyone—crew, passengers who can be safely awakened. If we’re going to make a decision that affects 2,000 people, we’re going to make it together. That’s not protocol. But protocol was designed for situations where we had more time. We don’t.”
“Captain, that’s not—”
“Wake them up, Yuki. All of them. It’s time they had a say in what happens next.”
In the cryo bay, 2,000 people began to stir. Some had been sleeping for 94 years. Some had been awakened for shift rotations—civilians who served as crew for five-year stints before returning to cryo. All of them, when they fully understood the situation, would have to decide: did they want to continue toward a destination they would never reach, or did they want to choose something else—turn back, find another world, do something that no colonial charter had ever authorized them to do?
The ship was dying. The question was what they would build from the wreckage.