The secret system of "tombkeepers" that has been passed down for thousands of years protects the tombs of emperors and generals. However, every generation of descendants who guard the tomb must face the choice between "keeping the tomb oath" and "breaking the tomb seal". In modern times, warlords fought, Japanese invaders invaded, and the rules of guarding tombs collapsed. The Dark Spirit lineage changed from guardians to tomb breakers. After the tomb guard's bloodline is awakened, "tomb patterns" will appear on the body and the tomb's mechanisms can be sensed. However, using tomb robbing skills will accelerate the erosion of "grave patterns" and eventually turn into "grave guarding ghouls".