Ricky gets sent to a private prison after killing a man. But the people in charge of the prison end up being more violent than the inmates, so Ricky takes it upon himself to teach their oppressors a violent lesson they will never forget....or actually they will, because they're all about to be turned into gooey piles of pulp. Ya gotta love films based on weird Japanese comics. 

This episode is also available as a blog post: http://randommoviemusings.com/2020/06/07/riki-oh-the-story-of-ricky-1991/