Valley of the Flying Unicorns.While Bloom is concerned about Sky's safety, having not heard from her for some time, the Star Case informs the Winx that the third prime star is beyond the clouds of Monoceros, home of the winged unicorns. The prime star is protected by a barrier that only unicorns can cross, but they are very wary animals; however, the fairies manage to gain their trust and be accompanied in flight. Meanwhile, Jasper and Sky are also on Monoceros in search of the lost medallion: during the mission, Sky realizes that Diaspro invented everything, but suddenly they are attacked by a black unicorn.