I walk the dark and dangerous streets of L.A. gang?land. A seemingly helpless young woman with silky blond hair and magnetic blue eyes. Moving down filth-strewn alleys and streets where power is mea?sured in drops of blood spilled by bullets sprayed from adolescent males who haven't learned to drive yet. I am near the housing projects, those archaic hotels of hostility where the checkout fee is always higher than the price of admission. Because of my supernormal senses, I know I am surrounded by people who would slit my throat as soon as ask the time of day or night. But I am not helpless or afraid, especially in the dark at night, for I am not human. I, Alisa Perne of the twentieth century, Sita of the ancient past. I am five thousand years old, one of the last of two vampires. But are there only two of us left? I ask myself. Something is terribly wrong in gangland L.A., and it makes me wonder. In the last month the Los Angeles Times has reported a string of brutal murders that leads me to believe Ray and I are not the only ones with the special blood that makes us impervious to aging and most other human ailments. The victims of these murders have been ripped open, decapitated, and, in some cases, the articles say, drained of blood. It is this last fact that has brought me to Los Angeles. I