When 12-year-old Jimmy Rourke travels to the Hydroverse, a watery universe nourished by streams of starlight, he becomes the Chimaera-a hero with the combined powers of the Animal Kingdom. To prevent the cataclysmic Big Freeze, Jimmy goes on a mission guided by Speck, a talking spider, and the mysterious sorceress Elane. Danger lurks in the Temple of Champions, the Council of animal ambassadors is divided, and it's up to Jimmy to protect an endless ocean of life.