A determined California detective attempts to crack one of the most mysterious cases in modern crime as the tale of the fearsome Zodiac Killer comes to the screen in director Alexander Bulkley
's cinematic account of the crimes that rocked San Francisco's Bay Area from December 1968 to October of the following year. As the citizens of the small California town of Vallejo prepare for their holiday celebrations, the discovery that two teens have been viciously gunned down at a remote lover's lane leaves the citizens of a once tight-knit community fearing for their lives. In the months that follow the brutal crimes, Vallejo police inspector Matt Parish devotes his entire existence to revealing the identity of the elusive killer and ensuring that no more innocent lives are taken. With pressure from both his superiors and the local press mounting, lack of sufficient evidence and increased tensions at home lead Inspector Parish down a series of frustrating dead-end roads. When the killer strikes yet again, this time shooting a young couple in a darkened parking lot, investigators are shocked to receive a phone call from a man confessing to the crime. A letter sent to the local newspapers by the confessed killer states that if it is not published, a dozen more people will die in the coming weekend. Even more curiously, the letter contains a mysterious code that, if deciphered correctly, will supposedly reveal the true identity of the man behind these shocking crimes. Though a suspect is questioned following yet another killing, this time in broad daylight, the frustrated police department fails to make an arrest as the elusive killer continues to taunt both the police and the media with a series of menacing letters.