ジョージ ハーヴェイ ボーンは 20 世紀初頭のロンドンの作曲家ですが、ピアノ協奏曲を書いているためストレスにさらされています。このストレスのせいで、彼は不協和音を聞くと意識を失います。停電の後、町の別の地区にいることに気づいた彼は家に帰り、その地区で誰かが殺害されたことを新聞で読みました。スコットランドヤードの医師に助けを求めた彼は、

George Harvey Bone is a composer in early 20th century London, who is under stress because he is writing a piano concerto. Due to this stress, he gets black outs when ever he hears dissonances. When he finds himself after the black out in a different quarter of the town, he returns home, to read in the paper that somebody in that quarter was murdered. Asking help from a doctor at Scotland Yard he is assured that he has nothing to do with it, but he is advised to cut back in his work and get some relaxation like other, ordinary people. At a cheap musical he meets Netta, a singer, who inspires him for a new motive for his concerto. But Netta discovers that this motive could also be used as a song for her. The song gets sold, and she hangs around George to get more songs out of him. George believes that Netta is in love with him, and gets in an argument with his girlfriend Barbara, the daughter of Lord Henry, who wants the concerto for one of his souares. George has another black out, ...