When Sherlock is sent to rehab, he meets Doctor John Watson, the man responsible for turning his life around.

After Sherlock's death, John opens his heart while writing him a letter to celebrate his birthday. If you want to have a better understanding about the context, please read the first chapter of my story "Since Sherlock was gone".

Sherlock wanted to give up again. However, it was no longer an option – not now. The world, full of unsolved crimes, needed him. Mycroft needed him. And, most of all, John needed him.

John couldn't simply understand why his best friend wouldn't tell him he was not dead. Could Sherlock possibly have a good explanation? P.S.: please note English is not my native language, even if I did a great effort to write properly.