Flynn was involved in a plot to kidnap Fethallah Gulen for $15 million. This was part of his association with Turkey. This has been in the public record for more than two years. They just aren't talking about it on Fox.
https://www.theguardian.com/us-news/2017/nov/10/michael-flynn-trump-turkish-dissident-cleric-plot
Your understanding is wrong. Flynn made a single plea to a false statements claim in exchange for not being charged with a variety of crimes, including FARA violations. There is no dispute that Flynn was acting as an unregistered foreign agent of Turkey and Russia.
https://www.lawfareblog.com/flynn-fisa-and-fara-foreign-principals-and-agents-foreign-powers
The Right wing people have a short memory. They want to make the entire thing about the one charge that Flynn plead to in exchange for dismissing all of the other charges they had him dead to rights on. It's comically in bad faith.
Flynn is a traitor. He's not the victim in this story. The allegations that he was framed make no sense if you read the documents.
Think for yourself! Read widely! Imagine that!