Because of the fall of an extraterrestrial meteorite, an abyss appeared on the ground. The military immediately took control of the land around the abyss and launched an investigation into the abyss.
Rare ores and some magical 'relics' were discovered in the abyss: there are 'fruits' that can fulfill any wish, there are pools of water that can bring people back to life, the 'existence' that makes the whole world forget a certain person or thing, as well as various strange creatures and strange phenomena.
Purpose: to overcome all difficulties and find the truth