For sixteen years, Celestra was locked in a castle on Floating Mountain. The girl was supposed to take her mother's place and become the right hand of the king of the Six Islands. In these lands, witches steal the souls of people and also prophesy death to participants in the divination festival. Over the course of two weeks, mortals must survive three tests. The soul of the one who dies will be absorbed by the king and endowed with immortality. However, those who remain alive will be granted the fulfillment of any wish. Knox, a soldier in the royal army, does not intend to die at the hands of the king and the witch. When his father was killed, the young man planned to take revenge: he would steal the king’s immortality and destroy his court, but he would start with Celestra. One touch was enough for the girl to see their tightly intertwined lives. Knox and Celestra enter into a dangerous alliance to escape the immortal king and together avoid a fate worse than death itself.