Nelly spots Risto on the street and tries to shout at him. Aunt Serena is surprised to see Risto in the shop. Downstairs neighbor Lennart Lindberg asks Risto to go fishing. Is there a Risto look-alike in town?
It's summer and Risto takes his friend Nella, Aunt Rita and neighbor Lennart to a holiday village. There they meet Bill and Sylvester Pöntinen, father and son who are preparing for a competition and flexing their muscles to be the best.
Big sister Heinähattu starts school and little sister Vilttitossu is jealous of that. Vilttitossu plots to take her sister's place in the class trip. Unaccustomed to the rules of school Vilttitossu ends up astonishing the classmates.
