A new Broadway show starring Gary Blake shamelessly lampoons the rich Carraway family. To get her own back, daughter Mimi sets out to ensnare Blake, but the courtship is soon for real, to the annoyance of his co-star, hoofing chanteuese Mona Merrick.
Commodore Caraway, one of the richest men in the world, his daughter Mimi and her suitor, explorer Frederick Sims, see themselves burlesqued in actor and author Gary Blake's On the Avenue Broadway musical revue. Backstage, Mimi slaps Gary and orders him to take the offending sketch out of the show. Planning to somehow get back at him, Mimi invites Gary for a supper date, but after dancing, hitting targets at a shooting gallery, having coffee and donuts at a diner and riding in a hansom cab through Central Park, they fall in love, and Gary promises to revise the skit. However, Gary's co-star, Mona Merrick, who also is in love with him, portrays Mimi in an even more insulting manner. In revenge, Mimi buys the production and, as a prank, after she invites New York's top entertainment columnists, she hires four hundred extras to sit throughout the theater and walk out during Gary's song and forces the Ritz Brothers to interrupt Gary's act with their shenanigans. After Gary rips up his contract and calls Mimi a selfish spoiled brat, she plans to marry Sims, who wants Mimi only for the Caraway money which he needs to finance his next expedition. Right before the wedding, Mona, realizing that Gary really loves Mimi, confesses her subterfuge to Mimi. Mimi's eccentric Aunt Fritz locks Mimi's father in a room, and Gary, impersonating the commodore, escorts Mimi into a taxi. After their marriage at City Hall, they return to the diner and order coffee and donuts.
