Poor service station workers Jaakko and Timo think they have won the lottery jackpot. The men are already making big plans when it turns out that the prize is actually worthless. Posing as American oil millionaires, the men get caught up in a web of deception.
Otto and Kaija have celebrated their surprise wedding, but after a coctail party nothing between them is the same as Otto does not remember what actually happened, and the mess is ready when Otto's American uncle who hates women comes for a visit.
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.
