An unknown disease is ravaging the homeworld of the Eeiauoans, a graceful, cat-like species with Federation membership. The epidemic is so horrific that no one can find a cure, and there are not enough healthy Eeiauoans to care for those who are critically ill.
The only hope is found in old secret songs, which Uhura has learned from an Eeiauoan friend who is now also in a coma from this disease. The songs imply that this species had come from another world originally, and that the cure for this disease might come from there. The crew of the Enterprise set out to find this unknown planet, on nothing but the strength of a song. Finally locating the planet from the clues in an old children's rhyme ("Sivoa, where the North Star beats like the heart of a child" indicates a pulsar which had been the north star), Captain Kirk and an away team beam down and find a jungle civilization of creatures nearly the twin of the Eeiauoans.
These Sivoans are very friendly and welcoming to the away team, but they have heavy cultural restrictions against even discussing the Eeauoans, and no one can find out why. Eventually the team discover that they are believed to be children.
The review of this Book prepared by Tabitha Higgins