For centuries, the people of Planet EXO have been keeping the peace between the other planets in the 7th sector and they continued to do so. One night a group from Death Planet known as the Hunters attacked the people and the leaders of each clan sent one person to a different sector so they could grow up safely. Those people were Minseok from the Frost Clan, Luhan from the Physic Clan, Yifan from the Sky Clan, Junmyeon from the Water Clan, Yixing from the Unicorn Clan, Baekhyun from the Light Clan, Jongdae from the Lightning and Thunder Clan, Chanyeol from the Dragon Clan, Kyungsoo from the Force Clan, Zitao from the Time Clan, Jongin from the Teleporting Clan, and Sehun from the Wind Clan. The rulers of their clans hoped that one day, those twelve will bring peace once again to the now warring planets. This is where their story begins.