Yotsuya’s party is trapped by the Deokk soldier Kamilto in a cave filled with ancient traps. Yotsuya becomes separated from the group, leaving the other three party members and Kahvel to fight a formidable gargoyle. Things look desperate when the gargoyle takes down Kahvel, but then Shindou reaches rank 10 and job-changes to a Warrior (Sword), allowing her to put up a fight against the gargoyle.

The current quest is to make Jiffon Island's harvest festival a success, but the festival can't be held because some orcs that strayed onto the island have taken over all of the Buffo that are traditionally offered as sacrifices. On top of that, the increasing number of orcs threatens the islanders' very lives. With the festival date only 11 days away, Yotsuya begins leveling up to raise his rank so he can help fight them, and his job changes to Blacksmith.

After becoming a Blacksmith, Yotsuya developed two new tactical weapons to use against the orcs: the Storc for close-range combat and the Orc Eater for shooting from a distance. Although they successfully use these to fight off the orcs attacking the stronghold, the orcs learn how to throw projectiles by observing the long-range weapon. Both the humans and the orcs have suffered substantial damages as the battle enters its final stages.

The islanders have sent the women and children away on a boat to protect them from the upcoming battle, but the orcs find and target them. Shindou and Cantil move to stop them, but in the midst of the fight, the earth begins to shake violently as the volcano on the island erupts. Pandemonium breaks loose as volcanic bombs rain down on the island... but this is only the prologue to a much greater disaster.

After completing the fifth quest, Yotsuya is back in his hometown when a woman named Glenda pays him a visit. She knows about the other world he's been to, and she claims to know at least three other people who have been there. Glenda hopes to get in touch with these parallel world explorers, but she's had no luck contacting them through social media. So she decides to produce a video of Yotsuya and his fellow party members that only people who have been to the other world would understand.

Cox, who had achieved peace in the village by closing it off and reducing the number of mouths to feed, attempts to get rid of the heroes, but then a monster's voice resounds throughout the village. Yotsuya and the villagers are powerless as a multitude of monsters swarms the village, as if under someone's control. After determining that it would be impossible to defend against the monsters' attack, they decide to flee the village.

Yotsuya's party manages to escape the village, and then they encounter a large group of people. They turn out to be the ones who had been run out of the village under the pretext of going on the Journey of Hope to find the so-called New Eden. The party accompanies the villagers in their hurried search for a new permanent residence, even as monsters close in on them...