In Miami, superstitious, but very lucky showgirl Candy Williams narrowly misses several catastrophes as she makes her way to the theater. There, after a performance of the show Parisian Pretties for an audience of thirteen, she and the other members of her troupe, manager Hap Snyder, comedian Duke McGee and dancer Flo Neely, are thrown out. Finding his troupe broke, stranded and hungry, the resourceful Hap tricks the show's only fan, policeman Barney Mahoney, into agreeing to make a phony arrest, after the troupe has had a chance to eat a big meal at the expensive restaurant Anton's. However, Mahoney goes off duty while they are dining, and when a different policeman responds to Hap's pre-arranged signal, the troupe must work off the meal in the kitchen to avoid a real arrest. While cleaning the hall floors of the adjoining hotel, Flo overhears Brad Carson, a successful Tin Pan Alley composer, talking to his agent, Tommy Arthur, about a musical show he is writing and wants produced. Brad is hoping that oil magnate Otis Thayer, the father of Lorraine, a possessive woman he has been seeing, will back the show after Brad presents some of his songs at Thayer's upcoming birthday party. Lorraine shows up, and although Brad tries to make it clear to her that he wants her father's backing to be a purely business deal and that his personal interest in her is limited, Lorraine persists in trying to buy his love. Later, while trying to avoid black cats and sidewalk cracks, Candy causes Brad to crash his car. At the garage, the mechanic offers the loan of his car, an old clunker bearing the garage's business logo. After driving away, Brad narrowly escapes a second accident caused by Candy, but feels an instant attraction for her. He invites her on a date, and lets her believe that he is a mechanic, as the sign on the car indicates. After seeing Candy and Brad leave for their date that night, Hap follows them to a beach restaurant and introduces himself, hoping to get work for the troupe in Brad's new musical. Candy gets angry and leaves when she realizes that Brad has deceived her about his identity, but Brad agrees with Hap to secretly watch the troupe practice in Anton's dining room after hours. At the rehearsal, Brad and Candy make up, and Brad offers her and her companions roles in his show. However, later, after seeing Candy and Brad rehearsing, Lorraine jealously insists that Candy cannot be in the show if Brad wants Thayer's backing. Candy, presuming that Brad gave Lorraine reason to feel possessive of him, quarrels with Brad and distrusts his declaration of love for her. However, when Brad loses interest in his show and leaves for New York, Candy realizes he does love her and decides to help him. Disguised as genteel English persons, Candy, wearing a black wig, and Duke crash Thayer's birthday party, and are soon joined by Flo and Hap, who impersonate wealthy Texans. Together they lure Lorraine into the pool. While Lorraine is out of the way drying off, Candy takes off her wig and sings Brad's songs for the guests. Having enjoyed Candy's performance, Thayer is ready to sign a check, but Lorraine interrupts, claiming misrepresentation. Meanwhile, Brad has returned to Miami to face Thayer and tactfully tells him that he is not interested in romancing Lorraine for the money. However, Thayer is aware that Lorraine manipulates men with her wealth and is still interested in backing the show. To encourage Thayer to act immediately, Hap starts a bidding competition and almost causes Thayer to back out, but Candy announces that they will only accept Thayer's money. For the second time, Thayer prepares to sign a check, but the deal is again in jeopardy when Candy, realizing the date is Friday the thirteenth, almost stops him. However, to the relief of her friends, Candy renounces her superstitions, finally realizing how lucky she is.