His father told Chul-soo: don’t leave the basement apartment; look after your sister, Soon-yee; don’t open the door for anyone; finish your school work to show the teacher. But the food is running low, and he keeps writing his homework over and over again. Strange men are lurking outside, and voices on the radio speak of a world no longer existing. Why did their father abandon them? What do these men want? And why does their pet bird warn them with obscenities?