When ponies are unable to wake up from their dreams, it's up to Capper and Luna to work together to figure out what's going on and how to wake them up before it is too late.
Every dress Luna owns is a gift she had no say in. Every dress Luna owns was given to her by Celestia. Every time Celestia gives one is a way she tries to understand her sister.
Princess Celestia saves a pony from Rainbow Falls from stoning by her fellow townsfolk and gives her sanctuary in Canterlot. While investigating the matter further, she discovers of laws made without her approval.
On the Feast of Hearth's Warming Eve, Princess Celestia and Princess Luna risk their lives in a blinding snowstorm to bring essentials to a pair of poor ponies living in Canterlot