Li Bin heads to Anxi City, where he once lived and worked, with a mission: to investigate the mystery of why couples in one county there have a nearly 90% chance of having twins, and to develop a life-giving water. After a clash with someone, he is detained at the border-area Anxi City Detention Center. His unconventional remarks pique the person in charge's curiosity, leading to a special conversation with Li Bin. Sharing a room with all sorts of people he would never normally encounter, Li Bin begins a five-day stay. Watching television resolves his confusion, and at last he returns to an ordinary life.
