The immortal rules

Allison Sekemoto survives in the Fringe, the outermost circle of a vampire city, until she too becomes an immortal vampire. Forced to flee into the unknown, outside her city walls, she joins a ragged band of humans who are seeking a legend--a possible cure to the disease that killed off most of humankind and created the rabids, the mindless creatures who threaten humans and vampires alike.