Fanny is the new wife of stolid Henri Martel. Leaving on an important business trip, Henri foolishly leaves Fanny with the more worldly Blanche, who teaches the girl to drink, smoke and do the Charleston. The returning Martel, who hates Jazz and everything that goes with it, promptly divorces this new and improved Fanny, only to marry Blanche. But Henri and Fanny are reunited in order to avoid breaking the heart of the latter's visiting grandmother, discovering in the middle of the deception that they still love each other.