Plot
Eighteen-year-old Auden West, a recent high school graduate, goes to stay with her father Robert in the small beachside town of Colby, wanting to spend a carefree summer reinventing herself before she leaves for college. [3] A daughter of academics and an exemplary student, her mother Victoria objects to her wanting to spend time with her father. [4] An absentee dad for years, locking himself away in his office to work on his studies, he has an infant daughter Thisbe with his new wife, Heidi. [5]
Upon Heidi's suggestion, Auden goes to a place called "the Tip" on her first day. Wanting to experiment, she makes out with a guy, later regretting it. Heidi takes her in to her shop the next day, where she's to look after the receipts. She meets three other girls - Leah, Esther and Maggie - who work there. Maggie, ex-girlfriend of the guy Auden had kissed, is initially cold towards Auden.
A loner and night-person, Auden roams the streets after everyone else is asleep. [6] Ten days after her arrival she meets fellow insomniac Eli Stock. [3] A BMX biker, he takes her on nightly adventures and he challenges her to a quest to do all the things she missed out on in her childhood. On their first outing, they go to a secret pie shop, and he introduces her to Connect Four. The next day, they play mini golf and she tells him that she didn't attend her prom and regrets not being able to wear her prom dress.
Auden's mother turns up on a rainy day, taking her for lunch. As she expresses her disapproval of Auden bonding with Heidi, Maggie later comforts an upset Auden and the two slowly bond. Auden gets closer to the girls, being invited both to watch Maggie do cross-country BMX biking and to a Conch House party. There she finds out that Eli's best friend and BMX partner Abe died in an accident where Eli was driving, since which Eli has shut himself from everyone. [7]
During an outing to the drive-in to see The Princess Bride, Auden and Eli talk about being night-owls. She admits that it started when she was a child, from trying to prevent her parents from fighting, but he doesn't talk about himself and deflects the topic. That night, she finds videos of him and Abe on YouTube.
Another evening, Auden agrees to do the quest, so they break into the lighthouse. Later, talking in Eli's truck, he pushes the idea of learning to ride a bike again, and she tries to bring up his BMX biking, but neither want to talk about it. A night when he is wheeling her around in a shopping cart, it falls over and, although she is fine, Eli panics and keeps on apologising. Worried, Auden asks him if he wants to talk about something, but Eli ignores the topic.
Auden asks Eli to attend the annual Fourth of July "Hot Dog Party" with her. Eli refuses, saying he dislikes parties. He gets upset when Auden brings up Abe. Hours later he actually shows up, surprising everyone. A food fight ensues and afterwards, during a night swim, Auden and Eli kiss for the first time under the fireworks.
On a coffee run, Auden sees her dad with a suitcase in front of the café. He reveals that he has temporarily left the house as he feels that Heidi is behaving unreasonably. Auden criticizes him for never trying hard and giving up the moment things become difficult. Auden calls her mother for help, who supports Heidi for taking a stand for herself and assures her that she did the right thing by demanding better from Robert. Affected by Auden's words, Robert eventually returns. After an honest conversation with Heidi, Robert takes on his fatherly responsibilities that he had long avoided, and starts helping out with Thisbe. Auden reconciles with her mother, who apologizes for acting jealous.
Auden and Eli have a temporary falling out. She refuses to admit, out of embarrassment, that she doesn't know how to ride a bike and when Eli tries to tell her it's fine, she gets angry at him and calls him out for giving up his dream of pursuing biking due to Abe's death. Later, after talking with Heidi, Auden asks Maggie to teach her how to ride a bike and slowly learns. Eli gets back to training and competes in the skate park in a biking competition days later. Auden congratulates him on his win, as Eli admits that he had quit biking because it reminded him of Abe but now realizes that he loves biking too much to give it up.
The next day, Eli shows up wearing a tux, so Auden comes out wearing her prom dress. She bikes with him to the beach, their friends join them also dressed for the prom, and they have an impromptu party where Auden and Eli kiss again.
In the closing scene, Auden, who is in Barcelona for college, reads a postcard from Eli. She and Maggie, college roommates, then head to lunch.
