The disease is coming for you. It'll break your limbs, shatter your brain, and take your breath away. Sadie's hiding more than her past. Rhodri's in a deathmatch with guilt. Oliver's days are nightmares. Amita's visions are weighing her down. But flash floods, rabid canines, and early onset dementia are the least of your worries when you're running from the very people who were supposed to protect you.