While the Secret Service was still trying to review the Asano Daigo family's case to no avail, Song Zhuowen accidentally learned of the existence of Guan Xue's top-secret insider “Squirrel” in the anti-Japanese organization. Zhuowen decided to find out the existence of this squirrel.
Another Japanese officer was shot dead in Harbin. Guan Xue realized that it might have been done by Guan Kai, because Guan Kai had a special pistol that happened to fire the kind of warhead that killed the Japanese.
Guan Xue returned home and asked Guan Kai to hand over the pistol. Guan Kai bit the pistol and lost it.Guan Xue was very angry but helpless.