Navigators and spies 'plot,' writers don't. Plot is cutesy jargon. Forget about it. It was coined by and for people who only talk about writing. You can't answer their question and they can't answer yours because plot is jargon.
All communication has a point or it is noise.
A book is a communication and has a point. Decide that your book will have one point and decide exactly what that ONE point is. Reduce the point of your intended book to one sentence. If not, change the point-sentence until it sounds important. If you cannot do this step then your story is a scrambled egg type of entertainment.