The story takes place towards the end of the 20th century and explores the idea that the human world secretly coexists with the demon world with a secret police force known as the Black Guard protecting the boundary.
The film was released in Japan on April 19, 1987 by Japan Home Video (JHV) and received a western release dubbed by Streamline Pictures under the name Wicked City on August 20, 1993. After Streamline Pictures lost the distribution rights, it was licensed and distributed by Urban Vision. A censored version of the film was distributed by Manga Entertainment in the UK with a different dub. Both Streamline and Manga UK dubs were released in Australia, the Manga UK dub being released on VHS in 1994. In 1995, Manga Video released in Australia a bundle VHS consisting of Wicked City and Monster City, this version containing the Streamline dub. In 1997 when Madman Entertainment was named distributor for Manga in Australia, the Streamline dub was released on a single tape, the Manga UK version was phased out.