Blanca por fuera y Rosa por dentro

Blanca and Ramiro are an unconventional marriage. They argue continuously for the mere pleasure of subsequent reconciliation. Blanca had a sister, Rosa, who died in a car accident a few years ago. After one of her daily marital discussions, Blanca leaves with the maiden and has an accident right in the same place where her sister had it before. As a result of this accident,Blanca, in addition to being totally amnesic, suffers an "ambivalent psychic dystrophy" that mentally makes her late sister Rosa.