Kell Crawford lives alone with his mother, who has a bizarre fascination with light. When she is murdered by a mysterious stranger, Kell goes on the run to escape the murderer and find the father who abandoned him as a baby. Chasing his mother's last cryptic message, Kell finds his way into an underground tomb, which transports him to a strange temple where skeletal priests worship the Light and think he is their Promised One. But something has gone wrong. Some other being has possessed a portion of his soul. The priests fear and hate him, and a terrible darkness seeks to claim him-all while an ominous power is growing inside him. Now, Kell must learn to harness that power before he loses everything-even his soul.