Hyo Jin is a 32-year-old woman. Two years ago, her husband died in an accident. Her husband has a 16-year-old son, Jong Wook, from a previous marriage. Hyo Jin begins to live with Jong Wook.

A new born girl is placed in a coin operated locker in the subway station. The girl is raised by a mother who is the boss for a loan shark group. Later, when the girl has grown into a teen, she carries out missions given to her by her mother.

Several groups of people try to survive a zombie pandemic that unleashes itself in downtown Seoul.