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,