Charlotte is the mayor of one of four cities, connected by a railway network, that used to celebrate Christmas together. However, this tradition ceased a few years ago. When Charlotte's son, Benny, learns about it from his substitute teacher, Zackary, he wants to see it revived. Meanwhile, the cities are under threat from a development plan that the state governor is pushing them to accept. Charlotte sees an opportunity to counter the governor's plans by rekindling the collaboration between the cities. It's not an easy task, as she must convince the other mayors, but she receives valuable support from Zackary.