There are thousands of orphans around the world because of several reasons such parent's divorce, economic situation, teenage unmarried mother and so on. The director wants to describe emotional changes between those parents and orphans

A-Ra (Ha Na-Kyung) works at a real estate office as the director. She also has clandestine meetings with some of her male customers for fun. Meanwhile, Mi-Yeon (Kwak Hyun-Hwa) begins working at the same real estate office. She hates it when men look at her body. One day, Mi-Yeon notices that somebody is secretly watching her and she gets excited. Mi-Yeon then begins exposing herself to the person watching her ...

Citizens from upscale Gangnam in Seoul start experiencing unusual and terrifying symptoms, devolving into inhuman creatures, leaving only a few survivors with the possibility to make it out alive.