Already struggling with a harsh winter and the threat of food shortage, a catastrophic event leaves those in the Landale camps reeling. Just when things couldn't get much worse, camp members fall ill with the same devastating sickness that's sweeping across the country.

Determined to gain the cure, Jace must travel to Valcré. However, there are only two sources--the queen, or a powerful gang of smugglers who have made the dangerous city their home. When Jace gains audience with the gang leader, he finds the price of the cure is steeper than any of them imagined, forcing him to make an impossible choice--betray his conscience or let those he loves die.