It's the birthday of Mökö and Luru, the sons of the noisy Kiljunen family. Making Luru's birthday wish come true is a tricky business. A day at the Linnanmäki amusement park requires money, but maybe you could get some by selling your own furniture! The Kiljunens with their sundry belongings travel on a bus to Helsinki, but the day doesn't go smoothly. The sale of armchairs and lamps is stalled and the beloved dog Pulla seems to be behaving strangely after meeting the President's dog who looks very much like him. In a series of coincidences, Linnanmäki seems to be slipping further and further away, but the Kiljunens won't let adversity big or small put them off!