The carousel is threatened by the world it was meant to help. Can the modern world be trusted with the secrets the horses protect? This is book 3 in the series. The themes get more serious as the horse and rider pairs goes out into the world to try to fix all kinds of real world problems like the superheroes that they are. This is for older kids who have been exposed to current events like the things they see on the news. It is to help them reflect on ideas such as good and evil, confronting fears and other emotions.