Mirja finds her grandmother's old hat in the attic and sets off singing along the road with it on her head. On her journey, she meets composer couple Theodor and Thea Tekonen and gets a ride from hat maker Kosonen and his son Ilmari, who falls in love with Mirja. However, the girl continues her journey alone and, with the help of the circus troupe leader, gets to perform at Linnanmäki, where Ilmari finds her again.
Mirja Halonen

Ilmari Kosonen

Thea Tekonen

Mary Moulin 'Maija Moilanen'

Donna Elvira

Theodor Tekonen

David Moulin 'Taavetti Moilanen'

Kosonen

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Mirja's Mother

Tiilipää

Matti

Kalle Vilkas

Gas Station Attendant

Constable
Olavi Tuomi (uncredited)
Aarne Tarkas (uncredited)

Regina Keso (uncredited)

Arvo Murtokallio (uncredited)
Luomakoski (uncredited)
Pekka (uncredited)
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