When an insane magician sinks the Golden Kingdom underground, its king emerges with a tempting offer: his treasure to whoever defeats the villain. Guilds flock to the challenge, delving into the labyrinthine dungeon. Laios, leading one guild, faces a tragic loss when a dragon annihilates his comrades and consumes his sister Falin. Undeterred by the ordeal, Laios, accompanied by the elven healer Marcille and the halfling thief Chilchuck, plunges back into the dungeon, driven to rescue Falin. With time pressing, Laios proposes a controversial solution: consuming dungeon monsters for survival. As they prepare their first monster meal, they are interrupted by the dwarf Senshi, a skilled monster chef, who offers his expertise. Intrigued by Laios' mission, Senshi joins the guild, setting the stage for their gastronomic adventures in the perilous dungeon.