Ruby knows it is important to keep the unicorns behind Magic Moon Stable a secret. Her big sister Iris won't let her forget it! Yet when her friend is injured, Ruby decides to sneak a unicorn, Starfire, into the hospital to cheer her up. Later, Ruby learns that someone took a video of Starfire and posted it online . . . and it is getting lots of views. Soon newspaper and TV reporters show up at Magic Moon Stables to see Starfire. Can Ruby and Iris protect the unicorn magic? Or will the secret of the Enchanted Realm—and the unicorns—be uncovered? 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.