Recently, I've been writing a mystery novel. I first listed the outline and then expanded it. However, when I expanded it, I felt that I didn't know where to start. I didn't know where to start.

Mystery novels needed to construct an intricate mystery so that the reader could gradually deduce the conclusion through clues. When building the story outline, you can consider the following aspects to simplify and enhance the plot: 1. Confirm the main clues and key clues. The main clue that drives the plot is the key for the reader to understand the background of the story and the relationship between the characters. The key clues were the important elements that would push the story forward through key events or clues. Finding the main clues and key clues would help to build the framework of the story and determine the beginning and end of the story. 2. Decide on the main and secondary characters. The main character is the key person who drives the development of the story, usually the protagonist or main character. Secondary characters were usually villains or secondary characters who served the main characters. Deciding on the main and secondary characters would help build the character image and plot development. 3. Decide on the main plot and secondary plot. The main plot is the main plot that drives the development of the story, usually the events experienced by the protagonist or main character. The secondary plot was the plot that served the main plot, usually the events experienced by the villain or secondary characters. Deciding on the main plot and the secondary plot helps to build the story and determine the beginning and end of the story. 4. Confirm key events and turning points. A key event is a key event that drives the development of the story. It is usually an event that the protagonist or main character experiences. The most important turning point in a story was usually the result of a key event or the change of a key character. Deciding the key events and turning points helps to structure the plot development so that readers can better understand the story. I hope the above suggestions will be helpful. When constructing the storyline, he could think over and over again, constantly adjust and perfect the storyline until he achieved a satisfactory effect.