This novel opens with the newest novice sixteen-year-old former noble, Serafina. More rebellious teen then a dutiful daughter, Serafina is too expensive and too much of a liability to marry off, so she is passed over in favor of her younger sister, and forced to take the veil. (This practice Dunant notes is very common though cruel). Serafina is highly valued to the convent both for her beautiful singing voice, and the generous dowry her family has promised. However the only vow Serfina makes is to herself--promising to escape at her earliest opportunity.

Serafina is contrasted with Zuana, a once defiant and now compliant nun. Zuana takes Serafina under her wing to try and ease Serafina's transition from court to convent. Both women soon become embroiled in the shifting alliances of the convent and rapidly changing religious atmosphere which could forever alter Santa Caterina as they know it.