Faced with the upcoming mega cold wave, heroine Xu Qingyuan discards the flashy residence and leads her family and partners to retreat to the ancient castle among the mountains. Everyone works together with one heart to stockpile supplies and build fortresses, uniting with the upright hunter Fu Xiao and a group of friends, relying on wisdom and courage to resist disasters and crises. Everyone helps each other to survive the harsh winter together, showing the kindness and resilience of human nature in desperate situations, and interpreting the valuable spirit of sharing weal and woe and protecting family and companions.