Knowing How I'll Write Free and Confined

Feeling more positive about my story, Free. I know how I'm going to write it. That, and Confined.
 
Let's just say Free goes forwards in storytelling, and Confined goes backwards.
 
You know what's gonna happen in one of the stories, but you know you cannot stop it, and the true reveal happens in the middle. Because you know already that you cannot stop the end no matter what you do. The ending is the beginning.
 
In the other story, you're just along for the ride. It goes all the way back to the beginning. The beginning is the ending.