This movie’s vampires follow three rules: 1) don't let humans know of their existence, 2) don't feed on someone without their consent, and 3) never go to Boyle Heights without permission. The first rule makes sense, the second is a surefire way to starve, and the third is a sign that these vampires should consider turning into zombies, because eating someone's brain is the closest they'll ever get to having one. According to the opening narration, “Things were much simpler in the old days. We hunted you and you hunted us. In Los Angeles, no one fought harder than a place called Boyle Heigh...