How To Write A Good Subplot. One’s useless, one’s dangerous, one’s effective, and one is absolutely vital if you want the climax of your screenplay to work. If a screenplay dies in act 2 or act 3, it’s just as likely the problem lies in the subplots as in the.

Here’s one way the ‘subplot’ might be considered subordinate: One way to do that is through subplots—secondary storylines found in novels, plays, television shows, and movies. Subplots are essential to the success of a novel.