When Yuko "Yasako" Okonogi wears her digitally-augmented glasses to view e-space, she sees an amazing series of images, information and programs laid on top of the "real" world around her. But when her family moves to Daikoku City, Yasako discovers that the e-space has a dark side as well. Her new classmates are involved in e-hacking, and the urban legends about dangerous entities hidden in the programming become much more believable when she learns that one of their friends might have died chasing one. Scariest of all, Yasako soon realizes that she has missing memories! Did something happen to her? And did it happen in our world or one that shouldn't even exist? To find out, she'll have to take a journey through the digital looking glass and learn the shocking secrets of the DEN-NOH COIL!