Rainbow Dash seems to be losing her mind, forgetting entire encounters and continually saying things that don't make any sense. Scootaloo gets to see Dash twice as much as she'd ever expected. Twilight Sparkle slips into full on-hermit mode. Applejack just wants answers... and to be with Rainbow Dash.

There's a double rainbow. What does it mean? It's so bright, so vivid....

A single normal day, a trip to a friend's home... it all turns sour as shadows from the past attack the present. To learn is the past's only use, as Applebloom comes to understand. The steady beat in the march of time may be lenient on her, but the past cannot be changed. The future, however, can be rewritten.