A puzzle plot or a device used in writing a book means mystery. Who done it? Who's going to do it? Why did it happen? What happened? Where did it happen? When did it happen? How did it happen?
One of the tricks is to hide the evidence in plain sight. This means clues given to the readers to solve the mystery. The writer is challenging the reader. Can they solve the puzzle before the hero or heroine in the story does? If not can they have one of those "of course" moments and wonder why they didn't see the solution first.
Begin with introducing the characters, and all that goes with this. Let the reader see what they think will happen. Perhaps it will or maybe it won't. From there go into the action of the story, showing the main characters finding clues, some may be true and some false. Following a false lead will add tension. This story can end with the mystery solved, the criminal punished or with an open end leaving the reader to speculate.