The year is 1979. Malaise, stagflation, turmoil in the Middle East, and a gas crunch; these things are but background noise for what unfolds when a lovesick businessman and a sociopathic drifter cross paths. John Nix, business manager of a Silicon Valley semiconductor startup, picks up Horace Fullworth, a ne'er-do -well heir of a wealthy California family, who has returned to San Francisco after surviving the Jonestown Massacre.
After John discovers his girlfriend cheating, he drives to a bar in the small rustic town of La Honda. He meets Ellie O'Neil, a pretty young woman he offers to drive home. Feeling misled by her, he leaves her on the side of the road, where Horace finds her. John hears that Ellie has gone missing and is overcome with guilt. His struggle with his conscience leads him back to those rugged coastal foothills of the San Francisco Peninsula.