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. <p/> 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. <p/> No one is safe who falls into the shadows. <p/> 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. <p/> 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. <p/> Soon, the device feared to destroy the soul--the Tesla Gate--may be the world's only option for salvation.