None of the weather forecasts in Newtown are accurate these days. On her way to school, Bibi finds a frog, calls him Fridolin and decides to keep him as a weather frog. When Carla Caramba finds out about this, the Newtown News immediately makes its weather forecasts according to what Fridolin predicts. Carla discovers that Professor Hailstone from the Newtown Meteorological office had also always depended on this very same frog because the instruments at the weather station are so old fashioned. After the frog had escaped, he couldn't make any accurate forecasts any more. Bibi returns Fridolin, whose real name is actually Fred.