Jalainur, a name from the beautiful Lake Hulun(aka Dalai nuur in Mongolian), is one of the last places in the world where steam trains are still running. It is also where the story begins. Master Chu is retiring from the open-cut coal mine where he has been working for more than 30 years as a train technician. Somehow he decides to retire one month earlier. His apprentice, Zhi-Zhong, whom he shares a father-son-like relationship with, insists on seeing him off, accompanying him along the way to his daughter's place, somewhere miles away on the border between China and Russia.