Though brave and resourceful, Felix has a heart condition that threatens his life. On his summmer vacation, Felix visits a spot called the Divide, where the waters that run down to the Pacific and Atlantic Oceans separate. Here, Felix tumbles into a magical backwards world, and meets fantastical creatures such as Ironclaw, an enormous brazzle, and Betony, a kind tangle-girl. With his new friends, Felix sets off on a thrilling quest to find a cure for his illness. But can he also find a way back home?
