Norman Bates (Anthony Perkins) finally gets his release from a California mental institution after he is found guilty by reason of insanity for the heinous murders he committed over 22 years prior. Lila Loomis (Vera Miles), sister of one of Bates' victims, has her pleas for a non-release fall on deaf ears. Having been declared of 'sound mind' again, Norman returns to his gothic childhood home and Bates Motel near Fairvale, CA, and takes up a job while on parole at a diner nearby. Norman becomes fast friends with a waitress there named Mary Samuels (Meg Tilly), and he ends up offering her a room for a while after her boyfriend tosses her out for someone new. However, as much as Norman tries to put the past behind him, he is beginning to get that old feeling again, as he begins receiving handwritten notes and phone calls from his mother, as well as her appearance in the house at various times, and people begin to start dying once again.