The tl;dr is that the Wired (basically the Web) has an issue of pulling people in so deep that they rot away or die to get deeper into it. Lain, the main character, initially gets on there to find out what happened to a classmate of hers, and then proceeds to become very heavily addicted to it, like many others before her, with the plot and world becoming incoherent over the course of the series, mirroring Lain’s psychological decline. You didn’t really stumble your way into describing the plot of it, but your comment very much sounds like something that’d be in it.