The elevator button on the 13th floor of the office building is broken. Every time you press it, the elevator will randomly stop in "Another Life" - the protagonist is an ordinary clerk. The first time he presses the "Entrepreneurship Success Version": he is wearing a suit, and the "Entrepreneur of the Year" certificate hangs in the office; the second time he presses it, the "Unemployed Version Life": he sells roasted sweet potatoes at the subway entrance, and his fingers are red from the cold; the third time he presses it, "Single version of life": I live in a rental house, have a cat, and the walls are covered with travel photos. The protagonist becomes addicted to the 13th floor, trying to find the "most perfect life" every time, but finds that each version has regrets: the successful version of himself is divorced, the unemployed version has a wife who loves him, and the single version of himself has parents long dead; what's even more frightening is that every time he comes back from "another life", his real life will be "affected" - the successful version of the suit appears in the closet, the unemployed version of the scent of roasted sweet potatoes remains on his hands, and the single version of himself has cat hair stuck to his pants.