Returning to the past, Twilight does what is necessary to save Cooper from his fate. The consequences for such choices, however, are not to be underestimated. Only time will tell if it was worth it...
Applejack finds a young filly on the verge of death at the edge of the Everfree Forest and as she's slowly nursed back to health, the earth pony decides to foster her, unaware of the many hurdles and dangers it'll bring her way.