Princess Li Lizhi of Changle encounters the mysterious Qin Shuo in order to escape the cold winter in Chang'an. This man from another world, with warm clothes and a strange mirror as gifts, and as a promise of the skill of washing coal, helped her obtain Wangjiazhuang wasteland from Li Shimin. The two joined hands to deal with the scrutiny of the emperor and the difficulties of the family, while promoting the coal industry trial. In the snowy Chang'an, they composed a warm winter strategy that not only had the love of their children, but also the responsibility of their family and country.
