The story takes place when One and her sisters are children. They use their powers to try to be a band of wandering superheroes and their first case has the group help a mother search for her young daughter who went missing in Sand Country.
One, along with his elven companion Nero, travel through Midgard killing all those that suffer from the Red Eye disease, in search of the Cult of the Watchers' leader and the origin of the Black Dragon.
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