Cristina Guzmán is hired to impersonate the disappeared sister-in-law of a rich man.

The musical group Los Bravos is enjoying a short holidays. It's in a mountain hut, near a girls' school, eager to see and hear.

Berta (Tota Alba) has entered, once again, in prison accused of fraud. From the first moment she steps in the jail, she becomes the toy of all the veteran inmates. The number of conflicts in which she is immersed causes her to be transferred several times from penitentiary. In all of them will live some experience that will change her life; she will know love, hate, despair, etc.