I love movies with black humor, and this movie has loads of it.
It follows the story of a mysterious man who, quite frankly, seems to be a little slow. As it goes on though you quickly will realize why that is.
It's a fun story though. You get a nifty idea of what it might be like for an immortal being who was stuck on earth. They work in a lot of cool little historical stuff to connect the dude to.
I 100% advise you watch this. There's some violence and such but it's so funny, just such a good time.