Charlotte is a 19-year-old girl from Earth, but she will become a legend known as the Blue Horse. A legend throughout history. And it all started with one meeting and a mystery man called 'The Doctor'. There will be love, there will be loss, and there will be one last promise that seems impossible to keep. So sit tight, get a sonic screwdriver, and dive in. This is a Doctor Who fanfiction, by the way. Hope you enjoy.