New York City socialite June Delaney is chagrined to learn that the majority of her money, which her late father had invested in England, has been impounded due to the outbreak of World War II. Hoping to earn some cash by renting out her luxurious apartment, June places an ad that is read by Pedro Sullivan. Pedro is a Venezuelan playboy whose American father, tired of his son's antics, has sent him on an important mission to secure a loan needed to keep their rubber company in business for two years until they can increase output. Pedro knows that he must succeed in order to prove to his father that he can be an asset to the company, but still cannot resist June's pretty face and takes her apartment despite its high rent. Mistaking June's apron for a maid's uniform, Pedro assumes that she is a servant, and June maintains the charade, telling him that Miss Delaney is out of town, in order to keep the handsome Pedro away from her man-hungry friend, Helen Martin. Pedro quickly becomes exasperated with June's ineptness as a maid, but has bigger problems in the shape of Ambrose Murdock Flint, the country's largest tire manufacturer. Pedro tries to convince Flint to help him with the loan, but Flint, who is obsessed with collecting antique weapons, refuses by stating that his company is investing in guayule, a rubber substitute that can be grown in New Mexico. After Pedro is turned down by Flint, he returns to the apartment and telephones Simon Cordoba, the New York representative of his father's company. Due to distractions caused by June's flighty friends, Cordoba misunderstands Pedro and believes that he has obtained the loan. That night, Pedro and June inadvertently go to the same night club, where June tries to rush out before Pedro sees her. A waiter reveals her identity to Pedro, however, and he follows her back to the apartment. Still pretending to be a simple maid, June allows Pedro to escort her to a dance hall, where they are involved in a brawl after Pedro insults some baseball fans. When they return home, June and Pedro find that they are falling in love as Pedro reminisces about his home. The next morning, Pedro is castigated by Cordoba when he learns the truth about the loan and is ordered to return to Venezuela. While he is packing, the jealous Helen tells Pedro that June was sabotaging his mission because she is trying to sell her New Mexican guayule ranch. Meanwhile, June has learned of Pedro's problems and is trying to help him by interesting Flint in an antique blunderbuss owned by her late father. Pedro misinterprets June's actions and believes that she is romancing Flint to further her own cause. Pedro's reaction and accusations anger June, and even after learning about Helen's lie, the quarreling couple cannot reconcile. Celeste Rowland, one of June's friends, advises June to make up with Pedro at her charity auction, and so June engineers the attendence of both Pedro and Flint. June auctions off the blunderbuss to Pedro, and the anxious Flint agrees to give him the loan in order to get it for himself. Convinced of each other's good intentions, the couple reconcile, although Pedro accidentally shoots one of Flint's tires with the gun.