Sixteen years ago, a strange tomb-raiding expedition plunged the protagonist into an endless realm of the uncanny. Mysterious guidance; a female corpse in the barren hills; a tomb full of corpse worms; undying ghostfire; looping mechanisms; eerie murals; beautiful celestial maidens; phantoms; ghosts; invisible men; underground palaces; haunted ancient cities; forbidden lands of the netherworld; a sinister riverside town; corpse-driving sorcerers; exquisite ancient pagodas; underwater coral tombs; terrifying tomb raiders; mysterious women; towers of stone; vast underground palaces; a shocking System; an escape... What is the real purpose behind all this? Why does this tomb-raiding feast never end? Why do those terrifying tomb raiders pursue their goal so frantically, refusing to stop even at the cost of their lives? Sixteen years ago, then again sixteen years later, Grandpa and Dad disappeared one after another. What exactly were they searching for? And how will this tangled, labyrinthine underground world of horrors come to an end?