Sometimes the girls at CHS forget Sunset is a pony, so when Rarity finds a rather odd bottle of shampoo in Sunset's bathroom, the confusion is understandable.
In the face of anon-a-miss, Sunsets runs away to Equestria to get a break and finds a welcome relief in her old life as a pony. Cultures clash as her CHS friends, determined to win her back, discover just how little they know about Sunset.
Thorax has taken on the role of leader of the changelings, but while Celestia promised they would leave the changeling kingdom to the changelings, the inexperienced Thorax finds he may need the help of his friends sooner than expected.