Illegal drug plantations are sprayed with the chemical Dromax by passing aeroplanes in an anti-drug initiative organised by corrupt government officials.

Instead of killing the plants, the hippie growers of the crop are turned into flesh-eating zombie-like creatures.

The film was produced in the late 1970s while McCrann, who was a graduate of Princeton University and Yale Law School and senior vice president at Marsh & McLennnan, was on hiatus.

[1] In the United Kingdom, Toxic Zombies was one of the films labelled a video nasty and banned in the 1980s.

"[5] McCrann would later work for Marsh & McLennan and was killed in their World Trade Center offices during the September 11 attacks.