Ajin, who lives with her father, is not the only one who is worried about her father, whose health has not improved significantly in recent years. One day, Ajin climbs a mountain to save firewood and avoids a sudden blizzard, and he meets Chen Sai, who had first escaped the blizzard in a cave where he accidentally stopped by. Chen Sai told Ajin that it is the most important treasure in the world, which is divided into 4 continents, 8 tribes, and 38 tribes in it. If you find the 'Cheonkyung' that each tribe keeps, you can save your father. Tell a story.

Mountains, seas, land, and humans... And God... A space in the unpredictable time of the beginning... continent… The unknown land and the races belonging to it... And the story... San Hae-kyung, who recorded the adventures and hard journeys of the boy 'Ajin' to save his father...

Ajin sets out on an adventure for 8 races on 4 continents to save his father. Through this Ajin, “Chen Sai” who wants to get the 魔鏡 that can dominate the world sees Ajin's journey from a distance, and the story of the epic mountain seascape that records Ajin's adventure begins now.