The first episode opens with the mysterious suicide of a high-school girl, Chisa Yomoda. Chisa-chan was a classmate of Lain Iwakura, a quiet, 14-year-old high-school girl. One of the other girls in the class has been receiving e-mail messages from Chisa-chan, and Lain discovers she also has mail from Chisa-chan. In the mail she explains to Lain that she just abandoned her flesh. She assures Lain that she still is alive in the \'wired\' world. After getting a new \'navi\' and adding a \'psyche...