Eliot and Fiona Post are twins whose parental clans are foes. Mom is Immortal goddess Atropos, eldest Fate. Dad is Infernal Lucifer, Satan. High School is Paxington, where gods and goddesses, warriors and sorcerers, learn to harness their powers. Classmates are allies in battle or threats to your life. To flunk is to die. Only the toughest graduate.