Detectives link two killings in Bellingham, WA, to Ken Bianchi, exposing him as the Hillside Strangler; facing death row, he claims amnesia and submits to hypnosis; decades later, Bianchi argues his murderous confessions were fabricated.

As the case falters, the judge turns Buono's prosecution over to the California Attorney General, launching the longest and most expensive trial in U.S. history; decades later, Bianchi maintains his innocence and fights for parole.