Martín, a talented and retired piano player meets Mariana, his best friend, Pedro’s daughter. Without thinking, a great love story is born between them, where Mariana is the inspiring muse. Martin is 42 years older than Mariana, that’s why both of them will face all the vicissitudes such a relationship entails. In the end, Mariana will find out that her mission is not to inspire anyone but herself.

It is a film that rescues the Mexican magical realism of the cinema of the 80's and 90's. Music has a very great importance and is the "third protagonist" of our history. It is a love story, with the differential that there is a generational abyss between the two lovers. 44 years separate them. What could come of that? What problems will they have? How would the morality of society accept such a relationship? How does the patriarchal, moralistic and misogynistic society of a people, which could be any people in Latin America, judge a woman who exercises her sexuality fully? These are the main questions that will be answered during this film. The narrative of La casa azul is contemplative, since it features large sequence shots, aided by lighting, music and naturalistic performances. It is a journey towards the new Mexican magical realism, where fantastic situations are present discreetly.