You are a famous scientist, and you are working in a laboratory with your assistant Joe. You are doing an experiment on a small flower. It is a very special flower because it can help people to see in the dark. But then somebody takes the special flower, and you can't find Joe. Is he the thief, or is it another person? What do you do next? Do you go to Joe's room, or do you look in the laboratory, or do you telephone your boss? Be careful – there is only one way to find the special flower again. But move quickly – there is not much time.