
Lefyn and his teacher, Felyn, are embarking on a journey towards the hero city after their residence in Lefyn town is attacked by monsters. The two set off in the morning, and along the way, Lefyn was anxious whether he would be safe in the hero city which was famously heavily guarded by churches and also vulnerable to being attacked by monsters. However, Felyn makes sure that they will be safe and invites Lefyn to calm down.
After arriving at the hero city, Felyn takes Lefyn to her residence and introduces one student who is her age, a girl named Evelyn. However, Lefyn felt that something was wrong with Evelyn. She felt that Evelyn was not human, but Lefyn did not want to tell Felyn this.
While in the hero city, Lefyn toured the skitar and met some people and heard about the problems in the city. One of the main problems is that many people are missing with no trace of this ending, and there are rumors that they were attacked by monsters that are unknown where they came from . Lefyn tells Felyn about the matter agreeing to help and find out what happened.
The next day, Lefyn and Felyn toured the city and talked to the locals. They discover some clues that lead to a cave outside the city, where the monsters are believed to have originated. However, the cave was extremely dangerous and heavily guarded by monsters.
Lefyn and Felyn enter the cave after killing the monster guarding in front of , entering the dark and moist cave carefully, wary of any danger that might lurk around them. They walked slowly, using torches to light up their gloomy path.
after trying how the huge gate could open, its end opened in front of them, revealing a large and beautiful room inside. The room was filled with blood-soaked treasures as well as corpses that had rotted away leaving even bone bones alone.
Lefyn and Felyn are shocked by what they see in front of them, and suspect that this is the work of demons and monsters who kidnapped humans and were killed here, and decided to go around looking for information that could be found useful .
But suddenly, they heard a roar again. This time, the voice was closer than before and sounded even fiercer. Lefyn and Felyn realized that they had to leave the cave immediately before it was too late because they believed the voice was a demon-controlled monster .
Lefyn and Felyn realize that the cave is the origin of the monsters and demons that attacked the city that happened late in this . They rush to the city to inform the guild master and invite other adventurers about their discovery and invite them to prepare themselves for a monster attack together tomorrow , because felyn's strength had not fully recovered after yesterday's incident at the lefyn residence, so it took a long time to recover perfectly