The small town of Eulenberg is being spooked by the little ghost. When the clock strikes midnight, the haunted hour begins. In Castle Eulenstein, the ghost can make suits of armor dance. He teases drunkards and tells his friend the owl the true story about the legendary General Thorsten Thorstensen.

But what does the world look like by day? The little ghost's deepest desire is to find out just that. But his wish comes true sooner than he expects, causing some difficulties along the way. Curt Linda based his charming animated film on the children's book of the same name by Otfried Preußler.