Mr Pocketbeer is a timid person. He is afraid of his landlady, his boss and basically of anyone who scolds and gives orders – until one Saturday a Sat crosses his path and decides on the spot to stay with him.
The Sat is a fearless, indeed almost irreverent creature who refuses to be intimidated by anybody or anything, who makes impertinent remarks everywhere he goes and scolds back when others scold him.
Mr Pocketbeer finds all of this terribly embarrassing to begin with and tries to get rid of the Sat again in all manner of ways. Yet strangely enough, the longer the Sat stays with Mr Pocketbeer, the more fond Mr Pocketbeer grows of the Sat.
And in the end, well-behaved, timid Mr Pocketbeer has turned into a self-confident person who has learned to stand up for himself.