A mysterious fog swept in, engulfing a city and carrying away everyone who got lost in it. Those people were taken to another world, a place filled with all kinds of strange and terrifying beings. After watching their companions die horrible deaths, they set out to find a way home. After countless hardships, they finally found a clue. But just as they did, the most terrifying calamity in this strange world struck: the Cataclysm of Heaven and Earth...
