Princess Dark Matter is one step closer on obtaining Princess Twilight’s cutie mark. Twilight chooses not to give up her cutie mark and fight her. But, this fight is not the same because Princess Dark Matter can deflect Twilight’s magic with her shield. Also Megan is held hostage, so she won’t be able to use the Rainbow of Light. Twilight must do whatever she can to defeat Dark Matter alone, and save her friend.