Malevolent spirits are unleashed upon Earth and one troubling machine may be humanity's last chance in this final entry in the Tesla Gate trilogy.

When the eye of the cosmic storm passes over Earth, the Impals--visible spirits who can't cross over--disappear. But, an ethereal void opens, releasing the lost souls of murderers, rapists, and genocidal maniacs. As darkness and chaos overtake the Earth, people everywhere face horrific fates.

No one is safe who falls into the shadows.

General Ott Garrison is immune to harm, which he feels is a sign from God--he is meant to lead. His son, Cecil, fears the opposite--that the general is a kindred spirit with the evil infesting the world.

On the run, Cecil and members of the Myriad Resistance become trapped in a secluded cabin in the Virginia wilderness. The only thing keeping at bay what lies in the shadows of the thick woods is a gasoline-powered generator, which is running dangerously low on fuel.

Soon, the device feared to destroy the soul--the Tesla Gate--may be the world's only option for salvation.