清洁的岛屿上，阳光灿烂，海风轻拂，白沙如扣，给人无尽的宁静与美好。老师h文

　　"4: Clean Island" follows the story of "4," who dreams of immigrating to the Clean Island, which is the cleanest place in the world, as she shares the story about a special pig at a strange immigration checkpoint where people have to confess their sins in order to pass through.