Carlos, a psychiatrist, protected by Professor Valdés and his successor, has as his patient María Ángeles, sister of his study partner Enrique. María Ángeles suffers a brain injury and during her crises she is attracted to Carlos. This one, in love with the woman, does not dare to operate her. However, María Ángeles gets married and the wedding night, under the effect of a crisis, flees from her house and goes to look for Carlos.