In a little street in Brussels named Rue Bosquet, two identical buildings stand together. In one of these buildings lives the famous concert pianist Martha Argerich, the Argentine who is recognized as one of the most original and temperamental pianists of her time. Next door we find the Tiempo-Lechner family, renowned by their lineage of piano prodigies, all of which have performed upon the most prominent stages in the world. Natasha Lechner, the lastest promise of the “pianist’s street”, has to live up to the legacy of four generations of great musicians. Even though she is still shaping her sound, the teenager has already enchanted the most demanding audiences. Her musical upbringing is an imperative family matter. Her mother Karin, who was also a child prodigy, is her teacher, mentor and adviser. As she enters the world of elite concert pianists, Natasha tries to answer a question: What does it actually mean to be a pianist? If there is an answer, it is to be found in the house next door, at Martha Argerich’s residence. We witness the inner world of a pianist whose work is arduous, meticulous and filled with uncertainty. Even Martha Argerich herself, at seventy years old, is still in the chimerical quest for the perfect technique. Despite having become a living legend, stage fright has never left her.