A decadent rock star. A deeply religious radio host. A disgraced scientist. And a teenage girl who may be the world's last hope. Shana wakes up one morning to discover her little sister in the grip of a strange malady. She appears to be sleepwalking. She cannot talk and cannot be woken up. And she is heading with inexorable determination to a destination that only she knows. But Shana and her sister are not alone. Soon they are joined by a flock of...