Amour is a musical fantasy with an English book by Jeremy Sams, music by Michel Legrand, and lyrics by Didier Van Cauwelaert, who wrote the original French libretto.
Adapted from the 1943 short story Le Passe-Muraille by Marcel Aymé, it is set in Paris shortly after World War II and centers on a shy, unassuming clerk who develops the ability to walk through walls, and who challenges himself to stick to his moral center and change others' lives, and his own, as a result.
In 1997, Legrand, a noted film composer and jazz musician, but a newcomer to stage musicals at age 80, brought the musical (under its original title, Le Passe Muraille) to Paris where it won the Prix Molière for Best Musical.
The Broadway production, directed by James Lapine and presented without intermission, opened on October 20, 2002 at the Music Box Theatre; it closed after only 17 performances and 31 previews. The cast included Malcolm Gets and Melissa Errico.
The musical received mostly negative reviews in America, although Errico, Gets and the score were praised. Ben Brantley, in his review for the New York Times, wrote: "Even charming is too weighty a word to describe the wispy appeal of Amour". The reviewer on Talkin' Broadway, however, wrote: "Broadway's Music Box Theatre may have found its most ideal tenant in quite a while. The delightful little jewel box of a musical, Amour, ...deserves a lengthy stay there, where it may enchant audiences for a long time to come." Cary Wong in filmscoremonthly wrote: "The lyrics are mostly pedestrian and uninvolving, and they make the already stock characters even more one-dimensional."
A "reconceived production" was produced by Goodspeed Musicals from August 11, 2005 through September 4. 
In Paris after WWII, a shy, unassuming "invisible" civil servant, Dusoleil, lives alone and works in a dreary office under a tyrannical boss. His lazy co-workers are unhappy because Dusoleil is a hard worker who finishes his work early. To pass the time, he writes letters to his mother and daydreams about the beautiful Isabelle. Isabelle is kept locked away by her controlling husband, the prosecutor-general with an unsavory past. When Dusoleil miraculously gains the ability to walk through walls, he begins to steal from the rich and give to the poor. He also gains the self-confidence to woo Isabelle, who is intrigued by the news stories about Passepartout, a mysterious criminal who can walk through walls.
Dusoleil's life, as well as Isabelle's and the other characters, takes a rich and, for a while, romantic turn. As Dusoleil admits to being Passepartout, he is put on trial in front of the prosecutor. Before the trial progresses, Isabelle reveals her husband's secret--that he was a Nazi collaborator. Dusoleil is pardoned and he spends one romantic night with Isabelle. When he takes pills that the doctor has given him, mistaking them for aspirin, he loses his magic power. He becomes stuck mid-leap in a wall, and his memory is carried on in story and song.
A recording of the musical was released by GHOSTLIGHT on July 8, 2003