Ada has always been unusual. As an infant in southern Nigeria, she is a source of deep concern to her family. Her parents successfully prayed her into existence, but something must have gone awry, as the young Ada becomes a troubled child, prone to violent fits of anger and grief. But Ada turns out to be more than just volatile. Born "with one foot on the other side," she begins to develop separate selves. When Ada travels to America for college, a traumatic event crystallizes the selves into something more powerful. As Ada fades into the background of her own mind and these alters--now protective, now hedonistic--move into control, Ada's life spirals in a dangerous direction.