Sumihara Tsuguto was once an ordinary seventeen-year-old, but not anymore. Now, he and the sheepfolk girl Loulier form an adventuring squad in a world completely unfamiliar to him. The duo are separated when Loulier is caught by Danaroot and his band of thugs and thrown into the dreaded "Trash Pit." Determined to find Loulier, he leaps in after her, and he is about to find out exactly why none have ever returned from it alive...