One month has passed since Misty abandoned Opaline and ponies made unity with the dragons again, and Izzy and Pipp are planning to host the next upcoming music festival - Glastonpony - where variety is always welcome! Whilst the Mane 6 are promoting the event, Sunny, whose alicorn powers are continuing to grow, comes across and falls in love with a handsome pegasus named Zack Thunderlane, and they surprisingly discover that they have a lot in common.

However, Opaline is bloodthirsty for revenge, and with the power of the dragon stone in her hoofs, she begins to plot her biggest attack yet on becoming the most powerful and dangerous alicorn in all of Equestria. But will the Mane 6 stop her for good before it's too late?

WARNING: Features death in two scenes, so do be warned about that!