Grisù helps Toramento, who is setting up a sightseeing tour of the Pink Cave of the Valley. But some funny facts happen in the Cave: signs moving apparently by themselves, strange noises… Toramento suspects that a ghost lives there, but Grisù doesn’t believe it. After a little mayhem, the little dragon finds out that the funny facts are caused by a small but sassy bat, who lives in the Cave and is annoyed by artificial light. Eventually, Grisù, helped by Stella and Toramento, creates a light system built with luminescent rocks, that spreads a soft glow that doesn’t annoy the bat.
