Hidden in a remote place surrounded by high mountains, there lies a secret valley. There is an entrance, but you could pass by it a hundred times and still not see it… It’s finally summer, and our friends from the hidden valley are gearing up for a dreamy summer afternoon! When a new, watery friend appears, Ticky, Mister Cold and the rest of the pals explore an exciting new underwater world. But a great monster lurks beneath the surface – will the gang be able to escape its terrible jaws before the summer party?