Doña Nati, the owner of a house of prostitutes, takes a little vacation to attend his niece's first communion in the village. She is accompanied on the trip by three of his pupils: Barbara, Mercedes and Eva who pretend to be her friends. But soon, men realize what they are and begin to try to flirt with them. Doña Nati makes a splendid gift to the people and thus wins the favor of its inhabitants.

An intense suspense thriller with an attractive blend of crime and mystery set in the unique historical backdrop of the Atapuerca paleontological site, home of the oldest human remains outside of Africa.