Iwakura Rein's classmate, Chisa Yohoda, committed suicide. The suicide incident without any warning left the classmates at a loss. A week later, Rein received a text message from Chisa. Chisa, who was clearly dead, actually started communicating with Rein through text messages. After returning home, Rein started to contact Chisa using the computer her father gave her. When asked why she committed suicide, Chisa replied, "Because I no longer need a body. Without a body, I can continue to live in the wired network." Puzzled, Rein continued to investigate Chisa's case and discovered a huge secret hidden in the wired network. Mystery also emerged in Rein's own life experience. Rein faced the truth in the online world, and Chisa's words kept ringing in her ears, "I live in the wired because God is there."