[Please help] Some issue with my theme?

Hi guys. I really don’t know what is wrong with this theme (downloaded from the ww.wp.xz.cn collection).

http://awesomescreenshot.com/00eoqxg57

This is the screen shot. Why is there a huge gap at the top? if it is not clear, this is my website http://www.emptytalks.com

Why is it like this? The top part is so empty as if something is missing there.

Please help and I am not tech savvy. Many thanks 🙁