With the sort of enemies the Fel has made, loose ends can be deadly. After narrowly surviving their last adventure, the Masker family knows there are forces plotting against them. Worse, a precious artifact is unaccounted for, almost certainly in the hands of a dangerous foe. The only option is to head north to follow the trail of the thief. When the hunt leads them to a plague-ridden forest not far from Fel's sister, he has to make a choice. Does he risk the disease to recover what's his? Or does he leave empty handed? A deadly disease. A deadlier quarantine. And deadliest of all, a mystery.