Three years after Steve Peterson's wife, Nina, was murdered in front of their 11 year old daughter Julie, she and his new girlfriend Sharon Martin are kidnapped by the same killer, the psychotic Artie Taggart. Imprisoning them in a bunker below Grand Central Station, he throws the police into a race against time to save the girls and catch the killer.
Along with his new friends, a teenager who was arrested by the US Secret Service and banned from using a computer for writing a computer virus discovers a plot by a nefarious hacker, but they must use their computer skills to find the evidence while being pursued by the Secret Service and the evil computer genius behind the virus.