As the environment was devastated and the whole ecosystem was destroyed, apocalypse befell planet Earth. Then Mother Nature heals herself from the destruction and pollutants vanish; a new world rises from the ashes, more beautiful and greener than ever. Rice ripens in fields that were never sown. Birds sing on trees that were once barren and lifeless. At the rebirth of the world, human beings return to their motherland and start a new journey. They begin at the land called Heron and swear to the moon that they will protect the land no matter what. In order to survive, citizens tend crops and grow a burgeoning agricultural business on LZ Farm.