Before Arrakis, there was Caladan. Before there was love, they were strangers. Jessica and Leto are brought together by agendas that aren't entirely their own-- Jessica must bear a female child by an Atreides to wed a Harkonnen, to bring forth the Kwisatz Haderach, and Leto must produce a male heir for House Atreides. A powerful Bene Gesserit, once on Caladan, Jessica begins to suspect she may already have the keys necessary to bring forth the Kwisatz Haderach. Leto must produce an heir, but is also expected to take a wife for political advantage. Love will guide their decisions, and lead them down the path of bringing forth the Lisan al Gaib.