Haunted by the memory of Walter Holderlin, a soldier he killed during World War I, French musician Paul Renard (Phillips Holmes) confesses to a priest (Frank Sheridan), who grants him absolution. Using the address on a letter he found on the dead man's body, Paul then travels to Germany to find his family.　　As anti-French sentiment continues to permeate Germany, Dr. Holderlin (Lionel Barrymore) initially refuses to welcome Paul into his home, but changes his mind when his son's fiancée Elsa identifies him as the man who has been leaving flowers on Walter's grave. Rather than reveal the real connection between them, Paul tells the Holderlin family he was a friend of their son, who attended the same musical conservatory he did.　　Although the hostile townspeople and local gossips disapprove, the Holderlins befriend Paul, who finds himself falling in love with Elsa (Nancy Carroll). When she shows Paul her former fiancé's bedroom, he becomes distraught and tells her the truth. She convinces him not to confess to Walter's parents, who have embraced him as their second son, and Paul agrees to forego easing his conscience and stays with his adopted family. Dr. Holderlin presents Walter's violin to Paul, who plays it while Elsa accompanies him on the piano.　　The film's original title, The Man I Killed, was changed to The Fifth Commandment to avoid giving wrong impressions in the minds of the public about the character of the story. It ultimately was released as Broken Lullaby.

在柏林的一家大饭店里。那时整个德国笼罩着经济危机的阴影。在豪华的大饭店里麇集许多来自不同阶层的人物。其中有陷入困境而避风头的财界巨擘普莱辛格，无奈色衰而想自尽的芭蕾舞演员格鲁辛斯卡娅，被赌博弄得倾家荡产而偷窃为生的旧男爵冯盖根，普莱辛格的旧属风烛残年的孤老克林格兰，以及年轻漂亮但贪婪自私的速记员弗兰苓等。　　这部第5届奥斯卡最佳影片是米高梅在30年代初期首创“全明星电影”的代表作。全片以柏林的一家豪华大饭店为人生舞台，表现五组人物在同一天之中的离奇遭遇。叙事手法虽然中规中矩，但几位大明星的表演却相当精彩，充分掌握角色的个性和处境，其中有：面临事业危机的俄国芭蕾舞女星、嗜赌的男爵、患上绝症的小人物、企业家等。这些角色以三线交错的方式上演着人生的悲欢离合，剧情发展流畅，场景虽然局限在大饭店中，但人物穿梭流动自然。故事在后来的《柏林饭店》（Hotel Berlin）和《琼楼风月》（Weekend at the Waldorf）中再度出现，并被改编成百老汇歌舞剧。

一个建筑师试图压抑自己对一个性感女人的热情。