Lyli wants to know what's over the mountains that surround her crowded city. She's not scared of the ferocious Stone-Muncher that is rumoured to live in a tunnel nearby. She doesn't believe in monsters!But when Lyli sets out on her expedition, she finds a lot more than she bargained for. Were the legends true all along? And what's really over the mountains?A lively story of friendship, adventure and extending your horizons.