When Kattilakoski family goes on a week-long Summer vacation to a rented cottage, the local police constables Bigbelly and Stronglass are joyful. Finally one week of peace! Their joy doubles when they win a rent-free summer cottage for one week. What they don't know is, that these two cottages are next to each other! When the truth comes out, the constables are forced to masquerade themselves to remain incognito. Unfortunately their alter egos, artistic Rubens brothers, become an instant hit for Mother Kattilakoski. Hayflower and Quiltshoe have instant doubts about Rubens; they must be escaped bandits instead. The girls set to prove their theory.
Ricky and Nelly decide to take part in arm wrestling competition during their summer holiday.
Serena Rapper gets a strange prediction: a genius has been born to her immediate family. When Serena finds a drawing Ricky has made, she is certain that Ricky is Vincent Van Gogh reborn. She decides to show Ricky's drawing to the intendant of the Art Museum. At the same time, a sketch of one of Van Gogh's paintings is found in Finland! This discovery starts an exciting chain of events, and in the end, the janitor of the Art Museum, a keen amateur detective, helps Ricky and Nelly to solve the mystery.
Hayflower starts her summer holiday on a badminton camp which is ruined by Cynthia, a runaway chicken. Quiltshoe makes a new friend, Anita, who, to everyone's surprise, turns out to be a chicken. Under the leadership of constables Bellybutton and Goggleclock, a big chicken hunt is launched.
Hayflower has started school, where she learns a lot of exciting brand new things. Quiltshoe doesn’t like to stay home without a sister to play with. When Hayflower tells about an upcoming fishing trip with her class, Quiltshoe comes up with a complicated plan, so that it will be Quiltshoe attending the trip instead of Hayflower. The trip evolves into a memorable and chaotic happening,
Ricky Rapper is bored because his best friend Nelly Noodlehead is only interested in young pop singer Ville Pyry. Everything changes when downstairs neighbour Lennart Lindberg lends Ricky his old video game.