Dr Jenn Hrluska qualified in record time. Most people assume it's because of her photographic memory. Only a few know that it's because she never sleeps. Jenn is a hemophage, she feeds on blood, which gives her extra-human powers, but without it she will die. Jenn and her grandfather believe in the sanctity of human life and in blood transfusion equipment, fighting the genetic compulsion to tear the throats out of their sleeping victims. Until another hemophage urges Jenn to give in to her natural desires...