Answer the following question: Build a movie plot around this: What relationship do Shelby and Austin have? Shelby is Austin's ex girlfriend.
Answer:
Samantha "Sam" Montgomery lives in the San Fernando Valley area of Los Angeles, with her widowed father Hal, who runs a popular sports-themed diner. Hal soon marries an exceedingly vain, and selfish woman named Fiona, who has socially-awkward fraternal twin daughters, Brianna and Gabriella. During the 1994 Northridge earthquake, Hal is killed when he runs to save Fiona. Having supposedly left no will, Fiona receives all of his belongings, including the house, the diner, and to her dismay, Sam.Eight years later, Sam is employed as a waitress at the diner to save money to attend Princeton University, but she is regularly tormented by her stepfamily. Sam struggles to cope socially at North Valley High School, where queen bee and cheerleader Shelby Cummings, also torments her and calls her "Diner Girl" along with other members of the popular clique.Sam confides in her online pen pal "Nomad" about her dream to attend Princeton, a dream which he also shares. However, Nomad's true identity is Austin Ames, the popular, yet unhappy, quarterback of the school's football team, and Shelby's ex-boyfriend, although she refuses to accept that he has broken up with her. Nomad proposes that they meet in person at the school's Halloween themed homecoming dance. On the night of the dance, Fiona orders Sam to work the night shift at the diner, then leaves to drive Brianna and Gabriella to the dance. Initially reluctant, Sam is convinced by her best friend, Carter Ferrell, to go to the dance and meet her mysterious online friend.Rhonda, Sam's other best friend, and the rest of the diner's staff also convince her to disobey Fiona and go to the dance anyway. Sam, wearing a mask and a beautiful white dress, meets "Nomad" at the dance, and is surprised to learn that he is Austin, who had become smitten with her upon her entrance. The two decide to leave the party to walk alone and get to know each other a little better. While sharing a romantic dance, Sam and Austin begin to fall in love. But just as Austin is about to unmask her,...