Summarize the main contents of Miss Feifei.

Miss Feifei told the story of Prussian troops invading France during the Franco-Prussian War. Captain von Erik is beautiful, pale and contemptuous of others. He often sounds like "Feifei" and becomes "Miss Feifei". He was a war maniac with a bad temper. He made rude remarks at the banquet held by the officers and showed contempt for France. Finally, he was killed by a French prostitute Rachel. With the help of the priest, Rachel successfully escaped the pursuit of the Prussian army until the end of the battle.