A brilliant scientist, Diana Purlow, conducts mind-reading experiments on death row inmates, including a man claiming innocence, but her efforts to save him are thwarted by her former lover, the Governor. When a notorious serial killer, Jesse Mowatt, is imprisoned and sentenced to death, Diana convinces the warden to let her test her device on him, only to confront the depths of pure evil.

Unspeakable
A courageous woman faces a horrific evil, drawing upon her inner strength to defeat the monstrous threat that threatens her very survival.