Series based on Raymond Briggs' bestselling children's book. Fungus has lost Mould up top. But Mould suddenly re-appears - he has found his own way home. Unfortunately, he was spotted by Jessica, who grabbed him as he fled through the Bogeyhole, and was dragged into Bogeydom with him. This is the worst crisis Bogeydom has ever seen - a dry cleaner discovering the existence of Bogeydom. As Fungus' family panics about how they can conceal Jessica, Mildew's sister Septic grows suspicious. But when she and Gunge confront Fungus, all are amazed to find that the room where they thought Jessica was held is empty.