This exercise is like the one you did in episode Start/Imagination. But it's longer. So make sure that you are not disturbed during the exercise (17 mins). Then start the audio file, close your eyes and follow the voice. Enjoy it!
For a good result you should try to imagine as lively and intensely as possible. If you can't concentrate: don't worry! Follow your imagination. That's okay. If you like to repeat: do it whenever you want! It helps you to immerse in the German language.