A Gang of young people call themselves the Living Dead. They terrorize the population from their small town. After an agreement with the devil, if they kill themselves firmly believing in it, they will survive and gain eternal life.
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While the biker gang is completely unbelievable, the occult angle surprisingly works - by being undeniably British. It's too bad the stunts aren't flamboyant and the scares aren't scary because there is clearly untapped potential in a satanic Flatliners on Harleys. There's a remake to be had, here.