iPhone keeps rebooting....?

Hey Everyone. My phone randomly died while I was listening to an audiobook last night. Since then, it will not turn on. It is in a constant loop of trying to start up. It will get to the apple screen and then shut down again. I tried the hard reset and got a screen that gave me the support website. I went to the website and did what it said to do. It took me back to the loop of getting to the apple screen and then crashing again.