Updating to High Sierra interrupted to a "flashing folder w/ question mark"

Hi everyone, I got a problem when updating my operating system from Sierra to High Sierra.

I have a mid-2014 version MBP retina (A1502) running the last version of macOS Sierra, but last night I run into a weird problem when updating it to macOS High Sierra. I let it download the files and restart to do the installation for hours. When I came back, I found a folder with a question mark blinking on the screen. Something was wrong, it went too high.

Following was what did:

1. I forced shut down and restarted it.

2. Hold the "option" key when booting (because holding command+c give me the same ? folder flashing), and the system let me choose a wifi network to "internet recovery", see the following beautiful picture:

3. After that I was able to see:

4. "Reinstall OS X" doesn't work, because it failed to find a disk. I tried to repair my disk. Click the  on the top left. There was an option called "Startup Disk". But I cannot found the start-up disk in the window:

What is wrong with my mac, the hard disk is physically permanently but strangely damaged? Is there any possible solution to try to save it?

Thanks, everyone.