Ryan Phillips, a master communications engineer at CommTek Corporation, leads a team of top computer and bio-technologists in the development of the MindLink, a computer chip that is implanted in the neck at the base of the brain. Once implanted, this revolutionary communications product allows its users to access and control their personal computers by simply thinking commands and hearing the computer responses within the brain, just as though they'd been spoken. Ryan's true love, neurobiologist Dr. Marie Davis, and software engineer Brad Johnson, are joined by reporter Lloyd Walters to work with Ryan as they prepare to release Version 5 of the MindLink, a new version that adds the capability to see computer output within the brain, just like it would appear on a computer monitor. In the midst of testing this new, incredible feature, the team stumbles upon some very unexpected behavior within the brain. As they look deeper into the problem, Brad suspects that the company's R&D group may have put more into the feature than was advertised, and knows it can't be good. Convinced that Brad is over-reacting, Ryan and the others doubt that anything malevolent could come from the quiet, little-known R&D group housed in the only high security building on CommTek Island, called the bunker'. But, when one member of the group is silenced the others begin a secret, and possibly dangerous, investigation into the cast of characters working there, and they begin to suspect that Version 5 could be a front for someone's darkest intentions