Sixteen years ago, a strange tomb robbing adventure plunged the protagonist into an endless realm of mystery. Mysterious guidance; corpse of a woman in a barren mountain; corpse insect tomb; immortal will-o'-the-wisp; cycle mechanism; strange murals; beautiful fairies; ghosts; ghosts; invisible people; underground palaces; mysterious ancient cities; forbidden places of the underworld; strange towns by the river; exorcists; exquisite ancient towers; coral water tombs; terrifying tomb robbers; mysterious girls; towers of sea of stone; huge underground palaces; shocking systems; escape... What is the real intention in this? Why does this tomb robbing feast never end? Why do those terrifying tomb robbers pursue it like crazy and fight to the death? Sixteen years ago and sixteen years later, grandfather and father disappeared one after another. What are they looking for? How will this complicated and bizarre underground world end?