Hu Bayi, Wang Kaixuan, and Shirley Yang venture the worm valley and the tomb of King Xian in Yun Nan, SW China in search of professor Chen.

In the capital city of Beijing, a middle school is about to hold a flag-raising ceremony. However, the flag raiser, Feng Xiao, is is struggling with a growing urge to step down. Unfortunately, this is not a gentle winter for him...…