When a peaceful village in a picturesque mountain valley is terrorized by a dragon, a grizzled mercenary named Iden answers their call for help. Although his motivation is more a cynical quest for wealth than a desire to do good, he nonetheless embarks upon a quest to slay the beast and claim its horde of treasure for himself. During his climb, he encounters a strange girl who is making the same journey with the intent of presenting the dragon with an offering in the hopes that it will spare her farm from its flames. Iden soon learns that nothing is as it seems, and his mission becomes more complicated than he could have realized.