Missing out excessive detail is exactly the point. Sometimes an agent might ask for a chapter outline instead, which is a synopsis of each chapter. Include any unnecessary detail, description, or explanation.
Soon the world shall know of its power. No wonder we hate the synopsis. Remember, less is more. But we read books for the characters, so your synopsis has to engage with those emotional aspects too.
Step 6. Make each word in your synopsis count. To me, writing a synopsis that could leave a reader still wanting to read the actual manuscript always seemed like a much bigger challenge than the query letter. Focus on summarizing your novel or book.