Young Biff Grimes is the son of an Irishman who's better at blarney than at holding down a job. Determined to make something of himself, Biff takes a mail-order course in dentistry and practices his handiwork on dear old dad. In his spare time he manages to fall for Virginia Brush, "the strawberry blonde, " but unfortunately Virginia is more interested in Hugo Barnstead, an up-and-coming financier. Virginia has another girl in mind for Biff: her best friend Amy, a suffragette with plenty of spunk.