After three years apart, Sunshine Smiles visits her... odd 'soul' sister, Moonlight Raven. The broody mare, having taken an opportunistic trail into a cushy life at Canterlot, struggles to understand what she wants out of her life. Both welcome and unwelcome, her sister's big re-entrance into it sparks deep, meaningful and inscrutable soul searching.

...if Sunshine would give her some peace and quiet first.

*Thanks to Meridian Prime, Manaphy, Mudpony and Samey90.