A night like any other in the streets of Hong Kong: in the midst of the tangle of night-owls, cars and vendors, a group of passengers climb aboard a minibus that is to take them from Mongkok to Tai Po. The group is as diverse as the city: theres a young man on drugs, an arguing couple, a woman with prayer beads and a girl who has just fallen in love, and behind the wheel sits the chatty driver. As the bus emerges from a tunnel, everything is suddenly quite still: the streets and buildings are all empty and theres not a soul to be seen; its as if everyone has suddenly been swallowed by the earth. Only the millions of neon lights continue to blink, as if nothing has happened. The eclectic group of passengers seek refuge in a deserted café and discuss what they should do. Then they make a horrific discovery.