An accomplished slave trader has his life saved by grace twice, and in turn must come to grips with his roll in this evil practice. Also a young politician gets a chance to put his faith into action and changes the world forever. 

Sources:

https://www.biography.com/news/amazing-grace-story-john-newton

https://www.christianity.com/church/church-history/timeline/1701-1800/john-newton-discovered-amazing-grace-11630253.html

https://www.christianitytoday.com/history/people/pastorsandpreachers/john-newton.html

https://www.learnreligions.com/biography-of-john-newton-author-of-amazing-grace-4843896

https://newsmaven.io/americanminute/world-history/amazing-grace-john-newton-william-wilberforce-the-fight-to-end-slavery--aG5QVAid0K1VAZ-ZEfhQA

https://www.beliefnet.com/entertainment/movies/amazing-grace/who-was-william-wilberforce.aspx

http://www.zionchristianministry.com/publications/books-by-shawn/john-newton-william-wilberforce-and-the-abolition-of-slavery/