Is there really a ghost in the second episode of the memorial file? I don't understand!

Yes, I thought the noise in the elevator was the mechanic's cell phone. After that, Edison Chen took the elevator home and saw a ghost. Only when he went home to search did he know that the building had been bought. The female star who sang that song was strangled and raped in the elevator before, so all the ghosts he saw were flushed and every episode was haunted. Edison Chen advocates that people have ghosts in their hearts, but every episode has an event, and they always encounter ghosts, which makes him doubt his beliefs.