In an effort to protect a small town from attacks by monsters and demons, a novice "dungeon maker" has decided to create a dungeon in a nearby cave in order to lure the monsters away from the town itself. Conceptually, the hope is that such creatures will find the dungeon appealing and hence settle there, rather than roaming about. The dungeon architect can then venture into the dungeon and exterminate them. As the dungeon grows larger and deeper, more powerful foes are expected to take up residence. Ultimately, the dungeon maker (played by the player) intends to attract a legendary foe, the "Wandering Demon", whose defeat will hopefully lead to long-term peace for the region.