Scientific research expert Wen Yan predicted the extreme cold disaster and built a high-tech greenhouse refuge fortress in advance. Her former colleagues tried to forcibly occupy it, but she calmly guarded the bottom line of her dwelling. While the outside world was frozen into ruins, the inside of the fortress had a constant and comfortable temperature with lush vegetation. During the long thousand-day winter, she recruited reliable partners such as security personnel to form a survival team. Together, they inspected equipment, fought against the extreme cold, supported and coexisted with each other, and finally survived the frozen years to wait until the ice and snow melted and spring flowers bloomed.