It’s the oldest story in the universe. This one or any other. Boy and girl fall in love, get separated by events - war, politics, accidents in time. She’s thrown out of the hex or he’s thrown into it. Since then they’ve been yearning for each other across time and space. Across dimensions. This isn’t a ghost story, it’s a love story.
When I was a little girl I had an imaginary friend and when I grew up he came back. He’s called The Doctor. He comes from somewhere else. He’s got a box called the TARDIS that’s bigger on the inside and can travel anywhere in time and space. I ran away with him and we’ve been running ever since.