When an ancient evil threatens to devastate Rin, overcoming its people with a fatal sleeping sickness, young Rowan, with help from a tribe called the Travelers, must decipher a rhyming riddle in order to save the land and its inhabitants.

After a flying lizard carries off his little sister, Rowan of Rin and three companions are guided by a rhyming riddle on a journey to the land of their old enemy, the Zebak, in order to rescue her.