After an insane magician sinks the Golden Kingdom underground, its king appears, offering all his treasure to anyone who defeats the magician, then collapses into dust. This promise drives guilds to explore the labyrinthine dungeon in search of the magician. Laios Touden leads one such guild, but a dragon wipes out his party and devours his sister, Falin. Having lost all their supplies and belongings, Laios, along with the elven healer Marcille Donato and the halfling thief Chilchuck Tims, immediately reenters the dungeon, determined to save Falin.
With time running short, Laios suggests the taboo of eating dungeon monsters to gather supplies. As they prepare their first meal in the dungeon, a dwarf named Senshi stops them. An enthusiast of monster cuisine, he helps them safely prepare the monster ingredients. Upon learning of Laios' situation, Senshi expresses a desire to cook a dragon and joins their guild, beginning their food-filled journey into the dungeon together.