Sometimes Iris wishes her mom and aunt still remembered that there are unicorns behind Magic Moon Stables. But the women don't know—or rather, don't remember—that unicorns exist. So why does their childhood friend Annie know about the unicorns? Not only does Annie know, but she also wants to use Rainbow Mist's magic . . . and maybe the rest of the herd's. Can Iris and Ruby protect the unicorn magic before it's gone forever? There are unicorns behind Magic Moon Stable, but no one knows they exist except Iris and Ruby. As Unicorn Guardians, the two girls must protect the unicorns to keep them safe from the outside world.