Nothing says fun and "zany" entertainment like abduction and sexual assault.
I guess true events are fair game, and dark tragedy is fair game, but the description of tone they're going for makes it a sad and gross idea for a movie.
“It’s rare to find an over-the-top true story with compelling characters and zany twists and turns like this, said Andriana Williams. “The all-consuming passion, absurd lawbreaking, and outrageous antics made news around the world then and can be sure to entertain today.”
Added Kirkby: “I’ve never read a more no-holds-barred fever dream of a script that whisks the reader on a journey of sex, obsession, and rock ‘n’ religion like Sinner v. Saints. Obsessive first love is a magnificent premise, and sprinkle on top a killer true story involving abduction, quirky supporting characters and the era of free love, and you have a cocktail of something very potent. It is a pleasure to roll around in the world of our anti-heroine Joyce McKinney.”
The Manacled Mormon case, also known as the Mormon sex in chains case, was a case of reputed sexual assault and kidnap by an American woman, Joyce McKinney, of a young American Mormon missionary, Kirk Anderson, in England in 1977. Because McKinney and her accomplice skipped bail and fled to the...
https://en.m.wikipedia.org/wiki/Manacled_Mormon_case