In Vienna in the early twentieth century, Lisa (Joan Fontaine), a teenager living in an apartment complex, becomes fascinated by a new tenant, concert pianist Stefan Brand (Louis Jourdan). Stefan is making a name for himself through energetic performances. Lisa becomes obsessed with Stefan, staying up late to listen to him play, and sneaking into his apartment and admiring him from a distance. Despite her actions, they only meet once and Stefan takes little notice of her.
A washed-up classical pianist, Charlie Kohler/Edouard Saroyan (Charles Aznavour), bottoms out after his wife's suicide — stroking the keys in a Parisian dive bar. The waitress, Lena (Marie Dubois), is falling in love with Charlie, who it turns out is not who he says he is. When his brothers get in trouble with gangsters, Charlie inadvertently gets dragged into the chaos and is forced to rejoin the family he once fled.
Paul Dietrich is an extremely gifted but disillusioned classical pianist running out of time to prove himself. He logically knows it is time to give up his attempts to enter piano competitions and instead accept a salaried position as a music teacher. Paul also needs to help his mother and his seriously ill father, but he decides to travel to San Francisco for an international piano competition. Doing so could cost him his job waiting for him in Chicago; nevertheless, he wants to try his luck for the last time before passing the age limit to compete.
The collaborative work between Pierre-Laurent Aimard and Stefan Knüpfer is at the centre of the film. Bach's The Art of Fugue is to be recorded. Pierre-Laurent Aimard has decided in favour of concert grand piano Nr. 109 for the Bach recording. The film begins one year before the recording.
Paul, jeune pianiste virtuose de 33 ans amateur de chouquettes, vit avec ses deux tantes aristocrates, Annie et Anna, qui tiennent un cours de danse dont il est le pianiste attitré. Il est muet depuis l’âge de deux ans, où il a vu ses parents, Anita et Marcel, mourir devant lui.
Dans les années 60, Mère Augustine dirige un couvent catholique québécois qui abrite une école de jeunes filles. Passionnée de musique, elle a donné aux cours de musique une grande place dans l'enseignement des pensionnaires. Le calme du pensionnat est soudainement brisé par l'arrivée en cours d'année de la nièce de Mère Augustine, Alice Champagne, une pianiste brillante mais une élève turbulente. Et, pour ne rien arranger, le pensionnat est menacé par l'ouverture au Québec de nombreuses écoles publiques gratuites. Mais les sœurs ne comptent pas rester oisives face à la situation.
Jessica has moved from her small Burgundian town of Mâcon to Paris to start a new life, inspired by her grandmother, Madame Roux, who "always loved luxury". In Paris, she initially has trouble finding work, and spends one evening without shelter. She eventually gets a job waitressing in a small café, the Bar des Théâtres, even though the café, following tradition, has never before hired female waiters. The owner hires Jessica only because he is expecting large crowds soon and needs staff. The café is in an area of Paris close by several artistic venues, including the Théâtre des Champs-Élysées and a concert hall, on Avenue Montaigne. One of the backstage staff at the theatre, Claudie (Dani), helps to welcome Jessica to Paris.
Traude Krueger (Bleibtreu) is working as a piano teacher in a women's prison. While selecting new students, she meets Jenny Von Loeben (Herzsprung). When she tells her she can't take any lessons because her hands are too rough and she is uncooperative, Jenny becomes enraged and almost kills the prison guard, Mütze (Pippig), also one of Krueger's students. Then she starts playing the piano. Krueger listens from the hallway and, impressed by her talent, later offers Jenny lessons, but requires absolute obedience, including eating a sheet of paper. She tells Jenny never to play 'that kind of negro-music' again.
Concert pianist Paul Orlac (Conrad Veidt) loses his hands in a horrible railway accident. His wife Yvonne (Alexandra Sorina) pleads with a surgeon to try and save Orlac’s hands. The surgeon transplants the hands of a recently executed murderer named Vasseur. When Orlac learns this, horror obsesses him. He is tortured by the presence of a knife he finds at his house, just like that used by Vasseur, and the desire to kill. He believes that along with the hands he has acquired the murderer's predisposition to violence. He confronts the surgeon, telling him to remove the hands, but the surgeon tries to convince him that a person’s acts are not governed by hands, but by the head and heart.
Ancien boxeur lessivé, Jo-ha (Lee Byung-hun) doit retourner vivre chez sa mère (Yoon Yeo-jeong ) qui l'avait abandonné et il fait la rencontre de son petit frère, Jin-Tae (Park Jung-min ), un pianiste d’un talent exceptionnel soufrant du syndrome du savant, qu'il ne connaît pas.
Francis Ingram (Victor Francen) is a noted pianist who lives in a large manor house near a small, isolated Italian village. Ingram suffered a stroke which left his right side immobile, and he has to use a wheelchair to get around. He has retreated to the manor house for the past few years—seen by only a few close friends. These include his nurse, Julie Holden (Andrea King); a musicologist (and amateur astrologist), Hillary Cummins (Peter Lorre); a friend, Bruce Conrad (Robert Alda); and his sister's son, Donald Arlington (John Alvin). Ingram has fallen in love with Julie Holden, and has changed his will so that she receives the vast bulk of his enormous estate when he dies. But Julie is secretly in love with Conrad. The change in the will disinherits Arlington and Cummins, and Cummins tries to expose Holden's affair. Ingram, outraged at the slander on his beloved's good name, tries to choke Cummins to death. Only Julie's arrival (after meeting Conrad in the garden) saves him.