The time corridor connects to the year 2099, a super skyscraper penthouse suspended in the air. The tech giant was killed in a "cloud chamber" with impeccable security systems, and all data showed no one entered or exited. The murderer took advantage of the loopholes and trust in the AI security system, and used preset instructions to let the cleaning robot complete the layout of the murder weapon (such as releasing specific allergens or poisons)... What magical experiences will the four-person team have?