Madrid, 1880. Elena Bianda is the most sought-after lady’s companion in the city. Despite her young age, more than twenty young women under her guidance have already found their way through respectable courtship and into suitable marriages.

Her success lies in striking the perfect balance: she is uncompromising when it comes to morality with their families, yet deeply attuned to the young women’s hopes and concerns. It is a delicate balance, and one Elena handles to perfection. She was born for this. Guiding her charges safely to the altar is, quite simply, her entire life.

But everything changes when Elena arrives at the Mencía household and is entrusted with the care of three sisters.