The urban legend about the blog which brings tragedy and fear. Shy and inner minded high schoolgirl Hitomi starts her blog with fake name. She writes and jokes about her school and friends, but whoever name is written on the blog encounters terrifying tragedy, even death.

Yuri Tatsumi breaks free from the chains of her family and runs away. She now lives as a freeter and resides at the cheap apartment complex Copo in Osaka. Other residents there include Hiroshi Nakajo, Teppei Ishida, and Yuzo Miyaji. These residents all have their own stories. Hiroshi makes a living by receiving contributions from women. Teppei does labor work and he is not good at expressing his feelings to women. Yuzo doesn't talk about his past and he seems to be involved in a suspicious business. One day, Yuzo finds that another resident there named Yamaguchi has hanged himself to death. Yuri and her neighbors sees Yamaguchi's death and they look back on their lives.

由出演过电影《数羊记》系列，以及音乐剧《网球王子》、《飙速宅男》、《银河铁道999 GALAXY OPERA》等的染谷俊之主演的悬疑恐怖电影。讲述工作能干，但不擅与人交往的富山良平，以晋升为契机搬到东京居住。在房产中介冈崎的介绍下前往某公寓看房，在房间内发现一副名为“黑蝶”的画。由于冈崎的强烈推荐，再加上富山比较在意住在同一幢公寓的神秘美女佐伯美緒，于是决定入住，但这幢公寓却隐藏着一个不为人知的秘密……