No superpowers, just a group of ordinary people: heating workers, food delivery riders, a convenience store owner, and a retired veteran teacher. Facing the frozen city, they set aside their differences, watched over and helped one another as neighbors, and used their expertise, courage, and kindness to save themselves and survive. Disaster tests human nature, and the cold freezes everything, but it cannot freeze the warmth of the human heart. Broken families protect each other in desperate straits, and tiny gleams of light converge to fight the bitter winter night.