And then, through the howling wind, someone called her name.

“Margaret! Please! You have to let me in!”

Margaret froze. She knew that voice.

“Sarah?”

Kaiser immediately sprang to his feet, barking wildly as he lunged toward the sliding door. Margaret snatched up her lantern and hurried across the freezing outer compartment.

The metal floor sent icy cold through the soles of her boots.

“Sarah! I’m coming!”

She grabbed the heavy door and pulled with all her strength. It wouldn’t budge. Snow was already piling against the entrance, packing itself tightly into every gap. Margaret pulled again, straining until her arms trembled. At last, the door shifted just enough to create a narrow opening.

A woman suddenly tumbled through.

It was Sarah.

Her hair was stiff with ice, frozen strands clinging to her cheeks. Her lips had turned blue, and one of her gloves was gone. The exposed fingers of her hand were frighteningly pale.

Margaret caught her before she hit the floor and dragged her farther inside.

“Good heavens, Sarah! What happened to you?”

Sarah struggled to get the words out.

“The bunkhouse… the roof… part of it collapsed.” She broke into a violent coughing fit. “There are people trapped inside. Miller is trying to get everyone out.”

A knot tightened in Margaret’s stomach.

“But why would you come all the way up here?”

Sarah’s eyes filled with tears.

“Because I told everyone you would end up dying alone. But when the storm hit, I couldn’t stop thinking about you being up here with nobody around to help you.”

Margaret stared at her in disbelief.

“You walked three miles through that blizzard?”

“I left before it got really bad,” Sarah whispered. “But then the snow became so thick I couldn’t find my way back.”

Her entire body began trembling uncontrollably.

Margaret didn’t waste another second. She guided Sarah through the wooden partition and into the insulated bedroom.

The moment Sarah stepped inside, she stopped in astonishment.

Warm air surrounded her. Not the faint warmth of a dying fire, but genuine, comforting heat. A small stove burned steadily beside the bed. The wooden walls were dry, and the room felt almost impossibly cozy compared to the frozen nightmare outside.

Kaiser settled beside the doorway, his eyes moving anxiously between the two women.

Sarah slowly looked around.

“Margaret… how on earth did you do this?”

“There’s time for questions later. Right now, you need to sit down.”

Margaret wrapped her in a dry wool blanket, examined her hands, and brought her a cup of warm broth.

Sarah accepted it with trembling fingers. Then tears began rolling down her cheeks.

She wasn’t crying because of the freezing temperatures anymore.

She was crying because the very woman she had mocked, dismissed, and believed would never survive alone had just saved her life.

Outside, the blizzard showed no signs of slowing down.

Throughout the night, violent gusts battered the old railcar, making its metal frame shudder and creak. By morning, snow had risen beyond the lower walls.

By the second evening, not even a trace of daylight could penetrate the tiny gaps around the outer door.

They were slowly disappearing beneath the snow.

Margaret kept the stove burning at a low, controlled level while regularly inspecting the chimney and ventilation system. She knew that every precaution mattered.

But there was another problem she couldn’t ignore.

With two people sharing the shelter, their limited supplies of food and water would run out much sooner than she had originally calculated.

Sarah noticed Margaret repeatedly checking the remaining provisions.

“I’m taking away food and water you need to survive,” she whispered sadly.

Margaret looked at her and shook her head.

“What’s the point of staying warm and alive if there’s nobody left to share it with?”

Before Sarah could answer, Kaiser suddenly began growling.

His ears shot straight up, and his body stiffened.

Margaret turned toward him.

Then she heard something strange above the ceiling.

A hollow knock.

Then another.

A moment later came a faint scraping sound.

Margaret glanced toward the stove. Its flame flickered unexpectedly, and a thin trail of smoke slipped from one of the pipe joints.

Her expression changed instantly.

“The chimney,” she whispered.

Sarah looked at her with growing concern.

“What about the chimney?”

Margaret had considered this danger ever since she began building the shelter.

Heavy snow was accumulating around the railcar’s exposed exhaust outlet. If the opening became completely blocked, the stove’s dangerous fumes could flow back into the living space instead of escaping outside.

She quickly moved toward the firebox.

But before she could do anything, an enormous gust slammed into the roof.

The chimney pipe rattled violently.

The little flame inside the stove bent sideways.

And then, without warning, thick black smoke began pouring into the bedroom.

Sarah coughed and covered her mouth.

Margaret stared at the spreading smoke, her heart pounding.

She had spent months transforming an abandoned railcar into the warmest, safest shelter on the mountain.

Now, that same shelter was turning into a deadly prison.

Would Margaret find a way to clear the blocked chimney and save them both?

Or would the two women perish inside the very room that had kept them alive through the worst blizzard of the winter?