Dan, a photography student who is given an SLR camera to use for his thesis by his professor Aim. However, Dan finds out that it actually is a test of the devil, which he has no way to escape. His only choice is to obey it or fight back.。想知道《我是歌手》第四季的幕后精彩吗?想知道歌手上台前都做了哪些准备吗?《我们的歌手》全程记录《我是歌手》第四季的台前幕后,精彩不容错过!。