An elegant residence overlooking a cliff in the north of Spain. An imaginary place: Lobreña, where this story begins and ends. This is the tale of Matilda Turpin, a welloff woman who, after thirteen years of happy marriage to a philosophy professor and three children, begins a spectacular professional foray into the world of high finance. This courageous move, in this century of women, will come at a price, implicating her in two important and very different professional schemes and costing her a common matrimonial project. Was it all a big mistake? When can we know for sure that we have taken the wrong decision? When we have made that decision, or when we suffer its consequences?