The film is adapted from real events. Florence Foster Jenkins was an American soprano singer in the early 20th century. He was welcomed by the audience with his poor singing skills and excellent entertainment skills.As a sponsor of the Verdi Club in the film, Florence Foster Jenkins usually sings only for her members, and her performance has received unanimous praise from the audience.Cosme McMoon applied for a piano accompaniment for Florence, but found her singing out of tune while accompanying her for vocal practice. McMoon thought it would insult his reputation, but he continued to stay with Florence's husband, St. Clair Bayfield.After vocal practice, Florence became more confident. She recorded records and held a solo concert, and then she decided to hold a solo concert at Carnegie Hall.Florence, who saw many celebrities present in the backstage, was nervous. With the encouragement of Bayfield and McMoon, she appeared on the stage, but her singing caused the audience to sigh. At this time, Mrs. Stark, who had laughed at Florence, stood up to make everyone cheer for Florence who sang wholeheartedly.The next day, the New York Post published a bad review about Florence's singing and was accidentally learned by Florence.She felt extremely disappointed, and in a trance she returned to Carnegie Hall and her singing voice was beautiful, and she slowly closed her eyes.