Kaileen lives in a dystopian society where all seventeen-year olds are required to be Linked to someone from their Circle, who will be expected to stay with them for the rest of their lives. However when an unexpected event happens at the Linking Ceremony, Kaileen and her Link has to go on an impossible mission to save her best friend. On the mission, Kaileen meets Lucas and is irresistibly drawn to him... Then she has to make the crucial decision: will she follow her head or her heart?