Are you thinking of querying a traditional publisher or literary agent about your novel? They may want a synopsis (or summary). A synopsis hits the story's high spots including giving away the ending. How can you do all that in 4 or 5 pages? With difficulty if you're like most novelists. Here are some articles that may help.
https://www.janefriedman.com/how-to-write-a-novel-synopsis/
https://jerichowriters.com/synopsis/