"Everyone has a soul. Some are beautiful gardens, others are frightening dungeons. Soulwalkers--like Kamai and her mother--can journey into other people's souls while they sleep. But no matter where Kamai visits, she sees the black door. It follows her into every soul, and her mother has told her to never, ever open it. When Kamai touches the door, it is warm and beating, like it has a pulse. When she puts her ear to it, she hears her own name whispered...