Build a movie plot around this: Who is Lila? Mary's Mother.
A:
This article's plot summary may be too long or excessively detailed. Please help improve it by removing unnecessary details and making it more concise. (August 2015) (Learn how and when to remove this template message)Norman Bates (Anthony Perkins) is released from a mental institution after spending 22 years in confinement. Lila Loomis (Vera Miles), sister of Marion Crane, vehemently protests with a petition that she has been circulating with signatures of 743 people, including the relatives of the seven people Norman killed prior to his incarceration, but her plea is dismissed. Norman is taken to his old home behind the Bates Motel by Dr. Bill Raymond (Robert Loggia), who assures him everything will be fine.Norman is introduced to the motel's new manager, Warren Toomey (Dennis Franz). The following day, Norman reports to a prearranged job as a dishwasher and busboy at a nearby diner, run by a kindly old lady named Emma Spool (Claudia Bryar). One of his co-workers there is Mary Samuels (Meg Tilly), a young waitress. After work, Mary claims she has been thrown out of her boyfriend's place and needs a place to stay. Norman offers to let her stay at the motel, then extends the offer to his home when he discovers that Toomey has turned what had been a shabby but respectable motel into a sleazy adult one.Norman's adjustment back into society appears to be going along well until "Mother" begins to make her presence known. Norman gets mysterious notes from "Mother" at the house and diner. Phone calls come from someone claiming to be Norman's mother. The next day, a drunk Toomey picks a fight at the diner after Norman fires him. Later, a figure in a black dress stabs Toomey to death with a kitchen knife as he is packing to leave the motel. As Norman begins to reconstruct his motel, he begins to doubt his sanity when he begins hearing voices in the house. He enters his mother's bedroom to find it looks exactly as it did 22 years ago. A sound lures him to the attic, where he is locked in.At the same time, a...