Sometimes they come back. At least the Kryszka aliens do. Their leader injects captured humans with a drug, turning them into zombies. Yeron escapes the Kryszka Colony, hoping to practice medicine on the humans who fear him. Alexis-a patient-is afraid too, until his seductive attentions arouse her. Despite his experimental drug, severe arthritis leaves her too weak to handle most guns. The Kryszka troops and zombies who break into the hospital are hungry. Very hungry. How will she fight them?