December 28th 1968, small-town California. In a deserted lover's lane a teenage couple are brutally slain…just because they were there. The killer disappears without a trace. Six months alter another innocent young couple are mercilessly gunned down. This time, within a hour of attack, the police receive a taunting phone call from the murderer, while the local papers each get a letter warning them that his killing spree is only just beginning.