For those disinclined or not to explore the world of fan art, the above computy-wallpaper sums up everything you need to know. A lot of photorealistic/Photoshoprealistic fan art is a forum for artists to explore the sex-tingle given off by stars (or Hobbits or whatever). The above image cuts straight to the chase, and depicts the artist himself protecting Winona Ryder with a huge, vertically held sword.
How they got in this fix, how "Knight Errant" and Winona Ryder were transported to medieval times, and the nature of the peril are all unclear. But instead of being muddled, it articulates something else very clearly.