It had been about a year and a half since Sherlock had fallen, and John still avoided Baker Street. Within a few weeks after the incident, he had moved in with his girlfriend, Clara Oswald. She had been the kindest girlfriend he could ever have hoped for.
Upon seeing his grief, Clara had demanded that the Doctor try to bring Sherlock back. Somehow, he had managed to steer the TARDIS into Hell. Though they tried, they couldn't find him there.
Then, the Cybermen rose from the ground, and the Mistress revealed herself. While she and the Doctor were on some sort of ship, Clara found herself standing in a graveyard surrounded by zombie Cybermen. Danny Pink, who had been hit by a car just a week prior, tracked her down and confessed that deep down, he still loved her and always would.
The rest, everybody knows. Danny Pink destroyed the Cybermen, and the Doctor killed the Mistress.
Clara returned to John that night and told him what she had tried to do, and how she had failed. They held each other close, missing their friend and wondering for the millionth time why he had jumped.
Months passed, and the Doctor never stopped by again. Clara told John that he had gone home, and John wondered what could be more like home than dinner at Angelo's with Clara, Sherlock, Molly, and the Doctor.
Then, there was the Christmas when Clara almost didn't wake up. The Doctor came around more frequently after that, and John went with him and Clara.
As time passed, the ache of losing Sherlock lessened, but it was never fully gone. As he walked home, he took great care to avoid Baker Street. It was just too painful to walk down. He would give anything just to have his best friend back.
He approached the door to the flat and paused. It had been thrown open violently. He ran inside, shouting Clara's name. There was no trace of her anywhere. John began to panic as he tore the place apart.
Clara's phone had been flung to the floor. With trembling hands, John picked it up and began to search through her contacts. He found the Doctor's name and dialed.
"Clara? How can I help you?"
"It's John. I need your help. Clara's gone missing. I think she was taken."
AN: Sorry if this feels rushed. I wanted to explain how those events fit in here without rewriting the shows. This prologue is mainly just set up for the story. Next chapter will be back to normal.