Ducheon, a native of Yangsan, meets an Eo-sa in Hanbu, thanking her for taking care of her mother's heir, and asking for help. An Eo-sa, who told Du-cheon that it could be dangerous, is suddenly shot and killed by an arrow from a monster. Doocheon, who thinks that there must be something a teacher is looking for, returns to the scene of the incident and picks up a sword.