Although many prefer solitude in their darkest times, meeting someone who'll go through those struggles with them is what they truly need. Sunset Shimmer runs into an evicted Sonata Dusk. Story's after Rainbow Rocks but before Friendship Games.
Long ago, when Discord ruled Equestria in a state of chaos, a great Arena was set up in the vastly populated town of Canterlot. It is here rich nobles pay to see peasant colts, kidnapped in their sleep, fight for their lives and freedom.