Master Tuula Vihervo teaches languages at a women's college, where American-Finnish Charles Thompson Jr arrives to do an inspection on behalf of his father's college donor. The arrival of a guest and Tuula's infatuation causes a stir inside the college and in a restaurant in Helsinki, where Tuula starts performing as the singer Irina Meller.
An artist bases a painting for a revealing lingerie ad on a photo of a girl he had found torn from a magazine, not knowing that the girl is in fact the daughter of the Finnish minister of finance. A scandal is about to erupt, and the artist is given 48 hours to find a strikingly similar-looking female model who could serve as his alibi. The minister's daughter decides to fool the artist by pretending to be a lowly girl of the streets, whom the artist then recruits as his "model".
Architect Paavo falls in love with and grows tired of the beautiful assistants in his office. On the advice of his middle-aged cashier Sandra, he decides to hire an ugly but hard-working woman. The resourceful Hilkka gets the job by hiding her beautiful face behind glasses and her curls under a scarf.
