Invaluable is the feature-length documentary film about Tom Sullivan, creator of the special make-up effects in "The Evil Dead", "Evil Dead II", and "Army of Darkness". This film contains footage and places never before seen until now and features interviews with Bruce Campbell, Scott Spiegel, Josh Becker, Ted Raimi, Hal Delrich, Betsy Baker, Sarah York, Ellen Sandweiss, Tom Sullivan, and many more.

Ash Williams and his girlfriend Linda find a log cabin in the woods with a voice recording from an archeologist who had recorded himself reciting ancient chants from "The Book of the Dead." As they play the recording an evil power is unleashed taking over Linda's body.