Smokejumper Lincoln Reid is speechless to see Jacob Hartman among his squad's new recruits. Jacob gets everyone's concerns, but he has waited years for his shot at joining the elite smoke jumping team. He's ready to tackle any challenge Linc throws his way. But close quarters and high stakes make it difficult for Linc to keep his resolve. And the closer they get, the more Linc's plan to leave at the end of the season risks him breaking another promise: the one his heart wants to make to Jacob.