We've been walking for over three hours, and we haven't found a thing. Emily's stumbled and almost fell four times. I don't know if she's tired, scared, or so lost in her thoughts she's not paying attention. Either way, I don't allow myself to get farther than an arm's length from her, afraid if I do, she'll end up seriously hurting herself. "Okay," Tom announces and stops. "Let's take a quick break." "Finally," Emily mumbles. I drop my backpack to the ground and use it as a seat. Emily copies me. "My feet are killing me," she complains. I glance down at her shoes. She's wearing a pair of those cheap canvas sneakers that don't have any support. "Don't you have actual sneakers?" She nods. "But I've only worn them once. I was afraid they'd be worse than these." She sticks her foot out

