Ok so I am kind of a fanboy here for a couple things that will bias my description. For one, I really love Vincent Price, who stars in this film. And as a second, I really enjoyed Richard Matheson’s book I Am Legend, which this movie is based off of. The movie here actually does a pretty good job of sticking to the book too (save some of the lewder parts of the book), and seeing Vincent Price act it out is pretty great for me. I would really recommend watching this one if nothing else on this website.
Basically, zombies have overrun everything, and ol’ Vincent, still human, is left by himself to survive and kill zombies by day. He does eventually find out more about what’s going on, and it has some surprising consequences.