A beautiful young computer technician starting off her career in Silicon Valley during the Eighties, is stalked and harassed by a nerdy, dangerous and mentally-unstable colleague with a twisted obsession.

The famous TV journalist Marcy Singer receives an anonymous phone call that orders her to the Blue Moon bar. When she arrives, she finds 6 corpses. Urged by her new boss, she investigates the case, and soon learns about evidence against her own husband Reed.