In the year 2000, strange portals started appearing all over the world. And at that very moment, people started to wake up strange systems, which gave him points, as those people killed the monsters, from those portals. Several people died trying to enter the "dungeons", which is how the worlds inside the portals were named. But others, some those who had a portal with them. Somehow, they won dungeons, gained points, leveled up. And they are called today, hunters.