Jealousy runs deep and darkness even deeper.
Luna has returned to Canterlot. Estranged by the new way of life she must accustom herself to, she struggles to make sense of it all. She doesn't understand what anypony says, she has few friends, the darkness of Nightmare Moon still haunts her dream and above all else, Cadance is replacing her.
With painstaking attention to canon, discover the story of Celestia, Luna and Cadance after Luna's return and learn that nothing hurts more than being forgotten again.
Directly follows the events of My Little Pony: Reconnect. Base story can be enjoyed without reading Reconnect, but may miss some of the finer details.