After a fun playtime activity of making a model castle, Timmy's imagination is all fired up. He wants to play at being Timmy the Knight, encountering dragons and saving Damsels in Distress. Along with Finlay, he dresses up as a knight and together they clippety-clop around the nursery on their trusty steeds - a customised broom and a hobby horse - and carry out several chivalrous deeds. The play acting bug takes over the whole nursery when together the pals all make a wonderful castle of their own out of big cardboard boxes and they all dress up. Timmy and Finlay's chivalrous spirit is put to the test when the friends hear what sounds like a real dragon.