Wheel Seal Circle

In order to resist interstellar disasters, prehistoric humans built the ring ecosystem ark "The Ring". Due to the system being out of control, it was divided into seven extreme areas by the air wall; about 1 million prehistoric genetic descendants (18-60 years old) around the world were forced to travel here. Seven regional hub cores need to be gathered to repair the Ark and close the air wall. There are 7 groups of indigenous guardians in the ring, who are bewitched by the ultimate villain [The Screener] and are hostile to the traversers. The Screener attempts to gather the core and activate the "weak elimination mechanism" to monopolize control of the Ark.