At the Beverly Hills Hotel, after a long night of drinking, sports writer Mike Hagen is hung over and anxious because he cannot recall writing his New York Record assignment that was due the previous evening. When fashion designer Marilla, whom Mike does not recognize, informs him that they actually wrote the story together and then attempts to return the $700 Mike paid her for her help, Mike, charmed by the spunky woman, insists that they spend the money together vacationing in California. After a whirlwind courtship, the couple marries and returns to New York, where Mike abandons his small, cluttered apartment for Marilla's East Side abode, site unseen. While packing Mike's apartment, Marilla finds a picture of woman caught in a seductive pose, but disregards it to avoid any conflict. At the newspaper office, editor Ned Hammerstein warns Mike that crooked boxing promoter Martin J. Daylor has placed several calls threatening Mike's life because of the reporter's articles about Daylor's racket. Later, Mike lunches with his previous girl friend, actress Lori Shannon, and announces his recent marriage. Lori soon grows angry at Mike's effusive descriptions of Marilla and tips a plate of ravioli in his lap. As Lori storms out of the restaurant, Marilla arrives and suspects the accident was caused by something other than his carelessness. After changing into a pair of short busboy pants, Mike returns with Marilla to her upscale apartment, where they walk into a surprise wedding shower thrown by Marilla's friends. Mike is embarrassed by his attire and contemptuous of the ceremonious gentility of the actors, artists and designers who surround Marilla while ignoring him. The only guest to befriend Mike is Broadway producer Zachary Wilde, whom Mike shuns when he realizes Zachary is Marilla's ex-boyfriend. Later, Marilla apologizes for her friends's behavior and tearfully defends her job to a stunned Mike. For several weeks the couple are quite happy while managing to keep their professional worlds apart. Then one night, Marilla attends a boxing match with Mike, where she is overwhelmed by the brutal fight, Daylor's threats and informant Charlie Arneg's demands for more money for information. The following week, Mike and his cronies gather at the apartment for their weekly poker game while, in another room, Marilla holds a reading of Zachary's musical, for which she has been chosen to design the costumes. The evening turns into a fiasco when dimwitted ex-boxer Maxie Stulz scares Marilla with his violent boxing stories and choreographer Randy Owen accidentally upturns the poker table with his wild dance steps. After everyone leaves, Mike mocks Randy for his effeminate behavior, but the dancer suddenly returns and offers to fight Mike over the incident. Marilla jokes that Randy is as punchy as Maxie, thus relieving the conflict. Days later, Mike attends Marilla's haut couture fashion show and finds Lori, the musical's new star, at his wife's table. Both he and Lori act as if they have never met, but when Mike bolts from his chair thinking Lori is about to dump her food again, Marilla becomes suspicious. During a subsequent rehearsal, Marilla finally concludes that Mike and Lori have had an affair when she recognizes Lori as the woman in the seductive picture. Meanwhile, at Marilla's apartment, Johnny O and several other Daylor henchmen try to force Mike to stop writing the articles by punching him. When Marilla walks in, Mike makes an excuse for his bloody lip and introduces the henchmen as his friends. After they leave, Marilla admits to previous romantic relationships hoping Mike will acknowledge his relationship with Lori, but Mike does not confess. When Marilla accuses him of lying, Mike denies the affair and leaves abruptly. At the office, Ned suggests Mike hide out to evade the gangsters while finishing his exposé on Daylor's boxing racket."