A brilliant professor invents a complex computer program meant to better society by altering the bad behavior of its test subjects.

However, this sometimes causes the personal belongings of these subjects to transform into deadly metal pinballs that attack people, as one unfortunate burglar discovers.

His shut-in daughter also uses the machine like a video game, unaware or uncaring of its real world effects on nearby machinery turning against their users.

In league with a mysterious man, the professor's psychotic assistant gets hold of the program and manipulates it to warp people's minds and turn them into murderous weapons.

She selects three young college girls as her victims and invites them to the professor's house for a weekend of torture and diabolical experiments.