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A passionate affair sends a married engineer on a deadly roller coaster ride of death and vengeance in this grim horror outing. The trouble begins after he moves to Spain where he will oversee the construction of his invention: a generator shaped like a ferris wheel. He is busy looking for a place to house his wife and daughter when he sees a desperate young woman trying to burn down her home for the insurance money she so badly needs. He stops the woman and they become passionate lovers. The affair is so hot that the engineer fears it will consume him and so he hastily extinguishes it. The jilted mistress flares up into a jealous rage and gets revenge by immolating the engineer's wife and child. He himself is horribly scarred and swears he will have his revenge.