Fiona has spent her life in a secluded tower, sheltered from the outside world by her fragile health. When the country is shaken by Zodiva—the Mad Wolf Disease—and political turmoil follows, her seclusion becomes both protection and vulnerability. Prince Mejojo wants her as his bride; her father refuses. The rejection becomes a pretext: Mejojo and his brother Auger accuse her of witchcraft and arrest her to be "observed" under their control. Her escape, led by her half-brother Nesso and butler Zara, begins a journey into a kingdom where humans, wolves, cats, and other species live under the rule of two cat princes who learned cruelty long before they learned power.