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.
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.