Begin the quest by speaking to Lady Tae. She will tell you how Apes have destroyed one of the villages in Central Valley. She will ask you to get rid of some of the Apes and bring her 10 Ape's Leather as proof. Lady Tae also tells you to speak to Don as he knows where the village is. Directly north of Lady Tae is Don who will tell you that the Apes are to the southeast of the town you are in. He will also ask you to bring him another 5 Ape's Leather. Head out the east exit from town and travel south until you meet a fork in the road. Instead of going east or west at the fork, continue going south up a mountain and you will reach the Ape mound. Kill Apes here until you have 15 Ape's Leather. Go back to the town and speak to Lady Tae. She will take 10 Ape's Leather off your hands and remind