When she is summoned to a law office to hear the reading of her aunt Arabella's will, London nightclub singer Lindsey Lane runs into her father, Carl Bellairs, whom she hasn't seen or heard from since childhood. Carl, a nightclub manager, raconteur and former confidence man, fails to recognize his head-strong daughter and, after flirting with her, is soundly rebuffed. To the consternation of both, neither Carl nor Lindsey is bequeathed more than a pound and a shilling by the will, which ridicules them for their mutually irresponsible behavior. Later, however, when Sir Tony Gelding, the owner of Carl's nightclub, hires Lindsey to perform during happy hour, Carl protests her drinking and her interest in Gelding and his fashionable friends, unaware that she is deliberately coaxing and manipulating his paternal feelings. Then Carl advises a drunk Dr. Bill Strong, Lindsey's American fiancé, to be tough with Lindsey and bring her back from Lord George Vivian's home, where she and Gelding have been gambling. Although Bill orders Lindsey to leave with him, she persuades him to join her in a treasure hunt, which has been organized by Lord Vivian. As part of the treasure hunt, Lindsey and Bill must find, among other items, an old woman and "the seat of the mighty." After hiring Mrs. Gamp, an old flower vendor, Lindsey sneaks into Gelding's apartment and steals his trousers to present as the "seat of the mighty." While Lindsey and Bill are procuring the last item, Mrs. Gamp discovers £1,200 in Gelding's trousers and runs away with it. When Lindsey returns to Lord Vivian's party, Gelding accuses her of the theft and fires her after threatening Carl with a scandal. To help Lindsey, with whom he has now grown close, Carl and waiter Spot Hawkins, a former partner-in-crime, execute the same betting scam they had perfected years before in Australia, and cheat an unsuspecting Gelding out of £1,200. Carl, who had promised Lindsey the money on condition that she marry Bill and settle down, delivers the cash to his daughter, then sets sail with Spot, one step ahead of the police.