"The Unforgivable" is a remake of a three-part British miniseries "Unforgiven," which aired back in 2009.
The story follows a woman named Ruth Slater, who's just been released from prison after a lengthy sentence for a violent crime — in the original series, Ruth murdered two police officers. When Ruth is released, she finds that most people will not forgive her, even though she's already served her time. After leaving prison, Ruth sets out to find her long-lost sister, who was put up for adoption shortly after she was incarcerated. Making this task even more difficult, the two sons of one of the murdered police officers are trying to find Ruth for revenge.
If "The Unforgivable" is anything like the series it's based on, it should be a dark story about a troubled character who's haunted by her past. That's very much in line with Bullock's recent films like "Bird Box." Reviewer Gareth McLean of The Guardian called it "measured and mesmerising" and said it was "the first best drama of 2009." If all goes well, hopefully his new version will live up to its predecessor.