Marion Crane (Janet Leigh)’s Timeline and Summary

Marion is in love with Sam Loomis, a small businessman from Fairvale, California, who's heavily in debt.
Sam visits her in Phoenix; they have sex during her lunchbreak. She tells him she wants to get married, but he feels he can't afford it.
She goes back to work at her real estate office. A client is paying $40,000 cash for a big deal. Her boss gives her the money to deposit in the bank.
She keeps the money, and sets off to drive to Fairvale to bring it to Sam.
On the way out of town, she sees her boss and he sees her. She's also stopped by a cop. She becomes more and more nervous.
During a rainstorm she's forced off the road near Fairvale. She decides to spend the night at the Bates Motel.
Norman Bates, the owner, offers her dinner. She hears him arguing with his mother, who disapproves of his paying attention to Marion.
Marion and Norman eat. Norman reveals his mother's insane.
Their conversation leads Marion to realize she should return the money. She resolves to drive back to Phoenix the next day.
She goes to her room and undresses. She is unaware that Norman is watching her through a peephole.
Marion gets in the shower. A woman with a knife appears and stabs her to death.
And that is the sudden end of Marion's story.