The movie starts with Professor Wyzinski (Jon O'Brien) receiving a package containing a brain cortex, carefully wrapped in saran wrap and resting in styrofoam. Delighted, he plugs the cortex into a robotic machine he calls "Ed."

His wife, played by Lisa Kinkaid, shows up in the garage in tight jeans and a white top. She has her doubts about whether Jon can bring life to the robot. Maybe that's because Ed looks like a piece of gym equipment overused by that 400-pound Rosie model that Ralphus posted recently. But the robot is certainly user-friendly because all you have to do is plug Ed into a wall socket, which Jon does. Ed moves briefly, but then dies.

Lisa voices more skepticism, and implies that she wants some action in the bedroom. Jon, proving that he is indeed a mad scientist, turns her down to continue working on Ed.

We then see Jon outdoors stroking his pussy (cat) while checking out blonde neighbor Kimberly (Penelope Pace) on all fours doing some gardening. She follows him into the garage, where she strips, teases him and then lets him take her doggy style. Ed watches the fun through a camera and shows signs of life.

Lisa decides to get rid of Ed so she can get some attention from her husband. She is about to smash Ed, but he comes alive and scares Lisa so much that she turns around and knocks herself unconscious by running into a wall. Ed moves in, plays with her nipples with his robotic arm and yanks off her jeans to reveal a pair of black panties.

Ed secures her wrists with his metal hands/clamps and she awakens. A dildo-shaped appendage is shoved in her mouth as she is forced to squat.

Penelope walks in and decides that with Lisa out of the picture, Jon will be all hers. She starts to masturbate watching Lisa's predicament. But Ed has other ideas.

A wire from the robot wraps around Penelope's leg and pulls off her shorts. Another wire goes up her snatch and she writhes in pain/ecstasy with robotic movements before passing out. She wakes up under control of the evil cortex.

Penelope heads over to Lisa still struggling with the dildo thing in her mouth. Lisa's tits gets fondled and licked in a scene that dragged on far too long. Ed finally cums.

Things get better though. Lisa is tied standing in a strappado position. She begs Penelope to let her go, and even offers her husband. Penelope responds by shoving a red ballgag in Lisa's mouth. Penelope torments Lisa's tits, pulls down her panties and rubs her pussy with long red fingernails. There's some great closeups of Lisa's gagged face as the lesbo and spanking action continues. After cutting off Lisa's top with scissors, Penelope grabs a belt and starts wailing away on Lisa's ass. This was a fairly convincing scene by both actresses. After a couple dozen lashes, Penelope puts clothespins on Lisa's nipples, and the sits down to masturbate.

From this point on, it appeared that the crazed evil cortex took over the editing studio at ZFX.

For reasons unexplained, Penelope is now tied with rope around her ankles and knees, with a knotted crotchrope. Single strands of rope are also tied around her huge cans and attached to a pulley hanging from the ceiling. She also has an apple-sized ball in her mouth and is handcuffed behind her back. She is wearing nothing but those horrible sneakers and socks.

We get a brief shot of Lisa loose and a wire going up her butt.

Magically, Lisa is suspended upside down with her arms spread out with leather cuffs and chains. Penelope has also magically freed herself, and ballgags Lisa.

After more fondling of Lisa, six clothespins are applied to her tits and six on her pussy lips. More lesbo action follows, and Penelope leaves Lisa hanging. At this point, I was left hanging as to what happened to the plotline.

Suddenly, Lisa is now possessed by Ed. Penelope is tied with red tape bent over and straddling a yellow wood beam, arms taped to legs. She is also tape gagged.

Lisa gives Penelope some light spanks, showing once again that Ms. Kinkaid should always play the victim. But Lisa does do a nice job of fingering Kimberly's butthole as her big-titted victim grunts through the gag in a fairly hot scene.

Ed shows his excitement by moving various parts of his body.

Next, Penelope is tied AOH with one leg strung up high in the air. She also has a crotchrope and gray duct tape gag. Lisa is harness-gagged with rainbow ball, arms tied behind her back, ropes over her eyes, ropes around her tits, and clothespins on her pussy. She also has a crotchrope that goes over a pulley and is attached to Penelope's crotchrope. The two struggle there for a while tugging on each other's crotchropes. I have no idea how they got tied up there. I guess it is assumed that Ed did it.

In the final scene, Penelope is strung up, suspended and stretched, breast tied, and a big OTM leather gag. And she is still wearing those damn shoes and socks. Lisa is in a squatting position, blindfolded, arms behind back, and cleavegagged with a belt. Penelope flips around a bit, and Lisa fingers herself from behind until she orgasms.

The movie ends with Ed moving around.

Machine Head starts off promising, but descends into confusion. Those who do not like girl/girl action will likely be disappointed, as will rape fans because there are no real penetration scenes, not even with dildos. (Ed's wire doesn't count.)

On the plus side, Lisa and Penelope, this time with long blond hair, work well together. There are a couple good moments, with the belt-whipping and the fingering. But the latter scenes seemed more suited for "love bondage" movies, not what I am looking for in a ZFX film.