"At the start, we won't have much money because I have to pay for my father's maintenance, but…"

"We'll live on what I earn. After you're a doctor, you can take care of me. There'll be plenty enough for us and our children and your father."

"How many children would you like?"

"Three."

Anthony laughed. "You're so sure of the number."

"It's good to hear you laugh."

"You make me laugh."

"By the time you're a doctor, maybe there'll be a cure for your father and you won't have to worry about him anymore."

"Isn't it nice to think so."

Anthony's mother died in a car accident the year he entered medical school. Her remarriage had been so unsatisfying that she'd taken to drinking heavily and had been intoxicated when she veered from the road and crashed into a ravine. At the funeral, the broker hardly acknowledged Anthony and his fiancee. That night, Anthony cried in her arms as he remembered the wonderful family he had once been a part of and how badly everything had changed when his father had gotten sick.

He took his fiancee to the firm that now maintained his father. Since the transfer, Anthony had been able to afford returning to his hometown to visit his father only sporadically. The distance made him anxious because the new firm didn't inspire the confidence that the previous one had. It looked on the edge of disrepair, floors not dirty but not clean, walls not exactly faded and yet somehow in need of painting. Rooms seemed vaguely underlit. The units in which patients were kept frozen looked cheap. The temperature gauges were primitive compared to the elaborate technology at the previous facility. But as long as they kept his father safe…

That thought left Anthony when he took another look at the gauge and realized that the temperature inside his father's chamber had risen one degree from when he'd last checked it.

"What's wrong?" his fiancee asked.

Words caught in his throat. All he could do was point.

The temperature had gone up yet another degree.

He raced along corridor after corridor, desperate to find a maintenance worker. He burst into the company's office and found only a secretary.

"My father…"

Startled, the secretary took a moment to react when he finished explaining. She phoned the control room. No one answered.

"It's almost noon. The technicians must have gone to lunch."

"For God's sake, where's the control room?"

At the end of the corridor where his father was. As Anthony raced past the niche, he saw that the temperature gauge had gone up fifteen degrees. He charged into the control room, saw flashing red lights on a panel, and hurried to them, trying to figure out what was wrong. Among numerous gauges, eight temperature needles were rising, and Anthony was certain that one of them was for his father.

He flicked a switch beneath each of them, hoping to reset the controls.

The lights kept flashing.

He flicked a switch at the end of their row.

Nothing changed.

He pulled a lever. Every light on the panel went out. "Jesus."

Pushing the lever back to where it had been, he held his breath, exhaling only when all the lights came back on. The eight that had been flashing were now constant.

Sweating, he eased onto a chair. Gradually, he became aware of people behind him and turned to where his fiancee and the secretary watched in dismay from the open door. Then he stared at the panel, watching the temperature needles gradually descend to where they had been. Terrified that the lights would start flashing again, he was still concentrating on the gauges an hour later when a bored technician returned from lunch.

It turned out that a faulty valve had restricted the flow of freezant around eight of the niches. When Anthony had turned the power off and on, the valve had reset itself, although it could fail again at any time and would have to be replaced, the technician explained.

"Then do it!"

He would never again be comfortable away from his father. It made him nervous to return to medical school. He contacted the cryofirm every day, making sure there weren't any problems. He married, became a parent of a lovely daughter, graduated, and was lucky enough to be able to do his internship in the city where he'd been raised and where he could keep a close watch on his father's safety. If only his father had been awake to see him graduate, he thought. If only his father had been cured and could have seen his granddaughter being brought home from the hospital…

One night, while Anthony was on duty in the emergency ward, a comatose patient turned out to be the broker who'd married his mother. The broker had shot himself in the head. Anthony tried everything possible to save him. His voice tightened when he pronounced the time of death.

He joined a medical practice in his hometown after he finished his internship. He started earning enough to make good on his promise and take care of his wife after she'd spent so many years taking care of him. She had said that she wanted three children, and she got them sooner than she expected, for the next time she gave birth, it was to twins, a boy and a girl. Nonetheless, Anthony's work prevented him from spending as much time with his family as he wanted, for his specialty was blood diseases, and when he wasn't seeing patients, he was doing research, trying to find a way to cure his father.

He needed to know the experiments that the lab had conducted and the types of rays that his father might have been exposed to. But the lab was obsessed with security and refused to tell him. He fought to get a court order to force the lab to cooperate. Judge after judge refused. Meanwhile, he was sadly conscious of all the family celebrations that his father continued to miss: the day Anthony's first daughter started grade school, the afternoon the twins began swimming lessons, the evening Anthony's second daughter played "Chopsticks" at her first piano recital. Anthony was thirty-five before he knew it. Then forty. All of a sudden, his children were in high school. His wife went to law school. He kept doing research.

When he was fifty-five and his eldest daughter turned thirty (she was married, with a daughter of her own), the laboratory made a mistake and released the information Anthony needed among a batch of old data that the lab felt was harmless. It wasn't Anthony who discovered the information, but instead a colleague two thousand miles away who had other reasons to look through the old data and recognized the significance of the type of rays that Anthony's father had been exposed to. Helped by his colleague's calculations, Anthony devised a treatment, tested it on computer models, subjected rats to the same type of rays, found that they developed the same rapid symptoms as his father had, gave the animals the treatment, and felt his pulse quicken when the symptoms disappeared as rapidly as they had come on.

With his wife next to him, Anthony stood outside his father's cryochamber as arrangements were made to thaw him. He feared that the technicians would make an error during the procedure (the word echoed from his youth), that his father wouldn't wake up.

His muscles compacted as something hissed and the door swung open. The hatch slid out.

Anthony's father looked the same as when he'd last seen him: naked, gaunt, and gray, suspended over a force field.

"You thawed him that quickly?" Anthony asked.

"It doesn't work if it isn't instantaneous."

His father's chest moved up and down.

"My God, he's alive," Anthony said. "He's actually…"

But there wasn't time to marvel. The disease would be active again, racing to complete its destruction.

Anthony hurriedly injected his father with the treatment. "We have to get him to a hospital."