After Mitch saves a young girl from drowning, he discovers her to be possessed by a demon who then possesses him for the demon needs a sacrifice to solidify its base of power on Earth. Aware that time is running out for him, Mitch must venture into the netherworld to find help from the only one who can battle the demon: the recently deceased Stephanie Holden.

On a day off, Ryan drags Mitch to a fortune-telling booth at the Malibu pier, where an Indian guide sends them into an eerie tunnel from which Mitch and Ryan emerge 20 years in the future to watch helplessly at their future lives.