FanFic. I don't own very many of these character... In fact, Virtually none.
Anyway... This story takes place after The Doctor's Daughter (Season 4, Episode 6). The Doctor, Donna, and Martha have left, believing that the Doctor's daughter, Jenny, was dead.
But she is not.
After leaving the planet that she was born on, she is in search of her father. Her quest takes her to find several of the Doctor's companions, both past, future, and present. She learns secrets about him that she never could have guessed from just meeting him. Was he really the good guy? Was his heart in the right place? Or are the Daleks right to wish to destroy him?