In the summer of 1984, San Francisco is gripped by fear. Neighbors, family, and friends are vanishing without a trace. Police are perplexed. The investigation takes a deadly turn when a killing field is uncovered high in the California mountains. As the body count climbs, the evidence points to an elusive killer. To bring this murderer to justice, a small town prosecutor must take a long, dark journey into the mind of a serial killer.