Symphony: The Last Sister
Symphony is the only child who had escaped from Galifrey on the last day of the great Time War. Taking her father's TARDIS, she takes off and escapes Galifrey and saves herself in fear of her own species being extinct. But instead of the coordinates that her father gave her a very long time ago to keep her safe, she crash-lands on a planet that is unknown to her. She crash-lands on the planet Karn, where she meets the sisters of Karn, the keeper of the flame of eternal life. She earns her trust to them by joining their sisterhood.
Later in her life, the Daleks have invaded Karn, destroying the sisters in any and every way possible. Now Symphony and one of the sisters that she has most trusted are yhe only ones left. They pack a bag full of their medicines and elixers and the last sister urges her to continue their work.
Symphony escapes in the TARDIS that she escaped Galifrey from.
And her journey begins.