The horror film is set on a remote island off the shore of an unidentified European country, in which the central character is a mad scientist (Cameron Mitchell) who creates hybrid trees that feed on human blood.

There they meet Baron von Weser, a reclusive scientist studying esoteric horticulture and experimenting with crossbreeding dangerous varieties of plants.

Factory (as part of their "Elvira Movie Macabre" series) is a terribly soft fullframe speckled mess that's full of drop-outs, emulsion scratches and jitter.

It's also obvious that it's a TV print (although it appears to be uncut), as every ten minutes the film fades to black.

"[2] DVD Verdict reported Maneater of Hydra is "...a badly acted and dubbed Eurohorror that gives us carnivorous trees feasting on unsuspecting tourists.