Yellow Vest. When Gwen is about to join the Yellow Vests movement, her ex-boyfriend Josh, with whom she spends a lovely "hotel room" moment, secretly slips a small packet in her bag. The next morning Gwen is missing. Tiffany, her friend and colleague, is worried; she didn't go to work. Why have she suddenly disappeared? Her friends decide to search for her and, experiencing one ordeal after another, will have to put themselves on the line....