Now a teenager, Elena grapples with the onset of puberty, her studies, and her friendship with Lila, who now works in her family's shoe-repair store. After a library awards ceremony reveals what Lila has been keeping secret, Elena learns what her friend's grand plans might be. Lila takes a stand against the dangerous Solara brothers.

Entering high school, Elena vows to stay ahead of Lila, academically and romantically. Lila eschews a parade of suitors vying for her affection, choosing instead to focus on her ambitions in the shoe shop. Promising a better future for the neighborhood, Stefano Carracci invites Elena, Lila and their families over for New Year's Eve, but things take a dark turn.

On the island of Ischia, Elena runs into the Sarratore family, reigniting her childhood crush on Nino, who is at odds with his father, the charming Donato. Back in Naples, Lila's resistance to Marcello's pressing courtship reaches a breaking point. On the day of Elena's 15th birthday, an unexpected encounter leaves her shaken.

Elena returns to Naples to find Lila has made a romantic connection with Stefano, despite the looming presence of Marcello. As Lila embraces a more glamorous life at Stefano's side, Elena warns her about what people are saying around the neighborhood. Later, in hopes of keeping up with her friend, Elena encourages one suitor and rebuffs the advances of another.

With sales of Cerullo shoes lagging, Stefano cuts a business deal with the Solaras against Lila's wishes. After Elena gets kicked out of a class for voicing her opinion, Nino encourages her to write an article for his magazine about her experience. Later, Elena and Lila get unwelcome surprises.

With Lila on her honeymoon on the Amalfi Coast, Elena struggles to handle school and her relationship with Antonio. When Lila returns with visible bruises on her body, the two girls revert to their natural closeness and Lila’s will to take revenge against her husband grows. Elena continues to be bewitched by Nino Sarratore’s charisma but chooses not to mention him to Lila.

Elena's relationship is threatened when Antonio discovers she has asked the Solaras' help to keep him from doing military service, while Lila remains rebellious in her marriage to the often-violent Stefano. After a photo of her is exhibited at a wedding dress shop in the center of town and becomes the subject of much gossip, Lila makes a bet with Elena about how the whole affair will end.

Upset that her picture is featured prominently in the new shoe shop Stefano is opening with the Solaras, Lila comes up with a creative solution to deal with the matter and enlists Elena’s help. Though Lila begins working at the Caraccis’ new grocery store, she continues to resent her husband’s business activities and the source of their income. Model student Elena invites Lila to a party at her teacher Ms. Galiani’s house; there, the two girls become acutely aware of the fact that they belong to ever more distant worlds.

Following her formative summer on Ischia, Elena throws herself into her studies and looks towards a future outside of the neighborhood. After a brilliant finals performance, Elena happens upon Lila, who is working at the shoe store and has grand plans for a fresh start. As Elena leaves Naples to commence her prestigious university studies in Pisa, Lila decides to leave Stefano and moves into a modest apartment, but the failings of her plan soon emerge.