Trailer
http://www.youtube.com/watch?v=UDFkMwR3sag

WARNING: Do NOT watch if blood and nudity offends you.

Elfen Lied, is the story of the Diclonoius'(two-horned humans), who were mutants created by humans. They had a special ability that could be described as a sixth sense.

The mutants had enough power to exterminate the whole human race. Humans being afraid of their powers, they were isolated into research labs to be studied.

One of the diclonius girls named Lucy broke out of confinement, killed the guards and escaped from the laboratory. She fell into the ocean after being shot and ended up on a beach. There she met Kota and Yuka, they named her Nyu and began to live with her.

The whole plot and premise of the anime is mind blowing and completely demolishes any super natural/horror anime out there. It's only about 15 episodes but it's a must watch.

I almost missed this series, cause the first episode was a little gross. But I finally set down and decided to watch some more. It's usually not what I go for, but I liked it and it really does through most of the other paranormal anime out of the water.