The Norwegian children’s favorite tractor Gråtass has to clean up when Goggen inherits and old and decrepit farm from his late uncle Georg. It soon becomes clear that some bad guys are out to trick the farm from Goggen as it holds a secret: A spring with magic water. The faithful tractor Gråtass knows that Goggen is about to be fooled and comes to his resque.Little Grey Fergie moves to a new farm with his friends. On the new farm they're going to have such a good time! But things don't turn out as they planned. Little Grey Fergie discovers that some crooks are trying to uncover a secret on the farm. They sabotage the running of the farm and destroy the friendship between Little Grey Fergie and his friends, to make Goggen sell them the farm.Little Grey Fergie helps out, and discovers that the secret is a valuable water source that he finds for Goggen. When everything seems to be solved, Fergie is kidnapped by the crooks, who also steal the water. Gamlefar, Goggen and Grynet have to do everything in their power to save him. Fergie gets away, and saves himself as well as the farm, so that everything ends up the way they hoped it would.