Trompie brags that he could get any role he wanted in the school concert. When his friends won’t believe him, he decides to prove it. He bribes Gerrit Moerdyk to lend him his tiger costume for the opening night. The plan is to make a quick appearance on stage as the tiger, but then to hand the costume back to Gerrit for the tiger’s dialogue scenes. Of course everything doesn’t go as plan and Trompie has to do some quick thinking on stage.