Paul McCartney was part of The Beatles, and also became a successful solo artist. He had it all, was super rich, everything he ever dreamed of. But then, he couldn't take all the fame anymore it built up. The crowds, the lack of privacy, the paparazzi... and he just broke, the drugs he used to use contributing to his health both physically and mentally. Now he's been at a private hospital for a while. His whole personality changed, his identity, everything. His brain blocked out the memory of ever being famous and everything that related to that. He wasn't the same.