In fourteenth century France, a 15 year old virgin, Blanche, levitates in church and nine months later gives birth to a daughter named Bonne. When Bonne is only 12 years old, Blanche is burned alive along with other "sinners" in a church. Bonne becomes a professional breast-feeder or "wet nurse." Her breast milk never stops flowing and seems to have restorative powers.
She finds herself catapulted from outcast to saint despite a series of catastrophes. When her town of Villeneuve is under siege and starving, she breast feeds not just children but many of the townspeople as well, asking only to listen to the individual's life story in exchange for her milk. Bonne's fate becomes deeply entangled with the lives of three friends: Godfridus (a chaste sculptor who goes mad), Hercules Legrand (a dwarf), and Radegonde Putemonnoie (a wealthy pregnant widow who hires Bonne).
