People starve to death on Philadelphia’s streets in “One Last Favor” because of overpopulation. Angry with a government that withheld medical treatment and benefits, the revenants—reanimated corpses who come back to harm the living—rise up to go after the ones they blame for their problems. The leader Kraven captures Tara, a nurse, and she is forced to trade sex with him for her life (the “one last favor” he requests). While the undead society grows and turns humans, using an ancient spell, Tara has his baby. Her child is kidnapped, and years later returns as a monster to confront her mother.