In a jealous rage, a man kills his wife and son in their home, and everyone who visits falls prey to a terrible curse.

On his request, the sensitive sister of a real estate agent visits a house he intends to put on sell, only to cross paths with its resident curse.

One day, a mysterious letter ‘F’ starts to be written on doorplates in a condominium building. Since then, mysterious incidents consistently occur around Yukari Yamamoto, who is an ordinary female…