Calling

Rin Kagura, Shin Suzutani, Chiyo Kishibe and Makoto Shirae visit "The Black Page", a mysterious website with only a counter that supposedly shows the number of people who have died after visiting the site. Rin is drawn there because six years ago she made a promise to a little girl in the hospital. Through an online chat room, she promised to visit the girl. When she got there, the girl was untraceable. Rin thought that the "black site" might provide some answers. Shin loves anime and the supernatural and was attracted to the "Black Side." After Chiyo Kishibe's grandson bought her a laptop, she heard rumors about the "Black Side." She thought that she might be able to meet her late husband. For Makoto Shirae, a newspaper editor, his friend died under mysterious circumstances. When he took over the investigation, they led him to the "black site." After entering a chat room on the site, Rin, Shin, Chiyo and Makoto are soon drawn into a strange void between life and death where the memories of the dead manifest, known as the "Mnemonic Abyss." With the help of their cell phones, they must try to escape the abyss.