He is unable to find a job, but his best friend Kurre (Hasse Ekman) spots an advert where a ladies' trio seeks a new cello player.
Sture, as his female alter ego 'Märta', travels to the little country town of Lillköping with the two other members of the trio, the sisters Inga (Elsie Albiin) and Barbro (Agneta Lagerfeldt).
'Märta' is admonished by his strict landlady (played by Julia Caesar) for visiting Kurre in his room, and he has to struggle to avoid being found out by Inga and Barbro.
Meanwhile, in Lillköping, Kurre has told Barbro that 'Märta' is actually a man, and when Sture returns after a successful term in parliament, he finds out that Inga knows his secret.
They stage an accident where 'Märta' drowns, and the grateful inhabitants of Lillköping erect the statue where, 60 years later, Sture tells his story to his great-granddaughter.