Synopsis by Hal Erickson
Three reels were all that Universal felt were necessary to tell the story of Hearts That Are Human. Seduced by a married man, a poor shopgirl is thrown out of her home by her unforgiving father. Like many another "lost soul," she finds a new home with the Salvation Army. The soldiers of the Army help her to get back on her feet financially by securing her a position as a maid in a wealthy household -- and you guessed it -- her new employer is the very man who previously "ruined" her. Upon discovering this, our heroine tries to kill herself but is rescued by a young composer, with whom she immediately falls in love. With the help of the composer's mother, a voice teacher, the girl becomes a singing sensation in vaudeville. In this capacity, she once more falls into the clutches of her black-hearted seducer, but this time her new sweetheart is on hand to pummel the villain. As icing on the cake, the hero also reunites the girl with her now-repentant father. How on earth did Universal manage to jam all this into three reels?