A young French soldier in World War I is overcome with guilt when he kills a German soldier who, like himself, is a musically gifted conscript, each having attended the same musical conservatory in France. The fact that the incident occurred in war does not assuage his guilt. He travels to Germany to meet the man's family.

A young impoverished aristocrat falls in love with an inn-keeper's daughter, but has to marry money.

Gwynplaine, son of Lord Clancharlie, has a permanent smile carved on his face by the King, in revenge for Gwynplaine's father's treachery. Gwynplaine is adopted by a travelling showman and becomes a popular idol. He falls in love with the blind Dea. The king dies, and his evil jester tries to destroy or corrupt Gwynplaine.

A woman allows her husband, who she knows no longer loves her, to believe that she has been killed in a train wreck. Her husband later finds her as a hostess in a gambling den.

On Ze Boulevard is a 1927 American comedy silent film directed by Harry F. Millarde and written by Earl Baldwin, William Scott Darling, Joseph Farnham and Richard Schayer. The film stars Lew Cody, Renée Adorée, Anton Vaverka, Dorothy Sebastian and Roy D'Arcy.

To avert war between their countries an official marriage is arranged between Crown Prince Boris of Moraine and Princess Flavia of Norvia. Prince Karl of Norvia sees in the alliance an opportunity to gain control of both kingdoms but upon visiting Boris finds him unyielding and independent. Flavia, shedding her stately dignity in the palace garden, is accosted by the flirtatious Boris, who believes her to be the princess' cousin; and falling in love, he realizes that he cannot go through with the planned marriage.

Nat Alden, a promoter, has had bad luck on his deal and is broke. He meets an old army pal who is now a chauffeur of the businessman who threw the luckless Nat out of his office. Nat is on his way back to his small hometown, where he is believed to be a millionaire. To keep the belief alive he has his pal drive him there in the businessman's automobile. Complications arise quickly.

The deformed Phantom who haunts the Paris Opera House causes murder and mayhem in an attempt to make the woman he loves a star.

Robert Andrews hosts a large party and there stages his own murder, to keep bank examiner Alfred Austin from examining the records of his bank.

When a wealthy man is found murdered in his bedroom, one of his two adopted sons is arrested and charged with the killing. However, the verdict at his trial is an acquittal. Since the police don't seem to be particularly interested in finding the real killer, the dead man's daughter-in-law--the wife of the adopted son who wasn't charged--takes it upon herself to solve the crime.

A nobleman, posing as a necktie salesman, falls in love with the daughter of a circus puppeteer, even though he is already married to the daughter of his country's war minister.