Following the Changeling Invasion of Canterlot, Twilight's friends, Princess Celestia and Shining Armor lament over how they failed to protect Canterlot from the Changelings as well for their behavior towards Twilight at the Wedding Rehearsal.
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
Luna’s filly was taking more of her mother’s time and Celestia’s reluctance to accept the father was driving a wedge between the Royal sisters. When Equestria falls under attack the sisters must act, but can they unite or will bitterness divide them?
Sisters are supposed share everything. Secrets, experiences, feelings, knowing silences... but sometimes first a silence must be broken for sisters to truly understand one another.