Pertsa and Kilu are two neighbour boys with different backgrounds. They live adventurous life of a young imaginary mind in small harbour town. Accidentally they get involved in a bank robbery. Through their own investigation of the case, imagination and real danger gets mixed and leads to great adventure where friendship and courage is on stake.
The birthday of twin boys, Mökö and Luru, takes the family Kiljunen to Helsinki, where their dog gets accidentally switched with the president's dog. Mökö and Luru rush to save their dog, while mother and father Kiljunen take over the city from land, sea and air.
