The story of The Summer I Turned Pretty (book and TV season 1) is a coming‑of‑age summer romance where Belly’s “glow up” flips all her long‑standing relationships at Cousins Beach upside down.

Main setup

  • Isabel “Belly” Conklin is almost 16 and spends every summer at Cousins Beach with her mom Laurel, her brother Steven, and family friends Susannah Fisher and her sons, Conrad and Jeremiah.
  • This summer, Belly has suddenly become noticeably pretty, and for the first time the boys (and other guys) start seeing her as more than just the little kid tagging along.
  • Belly has had a years‑long crush on the older, moodier Conrad, but she’s also very close to fun, flirty Jeremiah.

What actually happens that summer

  1. Belly’s “new” image and attention
    • People at Cousins Beach start flirting with her, and her best friend Taylor even starts to see her as competition instead of just the “sidekick.”
 * Belly struggles with insecurity and comparison, trying to figure out who she is when everyone suddenly treats her differently.
  1. Love triangle (plus one)
    • Belly gets a sweet summer boyfriend, Cam, and dates him for part of the summer, but she’s clearly using him as a stand‑in for Conrad.
 * There’s growing tension with both Fisher brothers:
   * She shares flirtation and small intimate moments with Conrad (late‑night talks, almost‑confessions, quiet emotional scenes).

   * She has fun, easier chemistry with Jeremiah, including a first kiss in a game of truth or dare in the book continuity.
  1. Family secrets and darker undercurrent
    • Beneath the beach‑romance vibe, Conrad is withdrawn and acting out because he knows a serious family secret before the others: his mom Susannah is very sick (cancer), though this is treated as a big emotional reveal and not heavily spelled out early on.
 * The adults (Laurel and Susannah) are dealing with divorce, aging, illness, and their own pasts, so there’s a parallel “best‑friends summer” happening with them too.
  1. The debutante arc and party drama
    • Belly gets pulled into the local debutante scene (dresses, etiquette lessons, a formal ball), which becomes a framework for the summer’s social and romantic drama.
 * There are classic teen‑show moments:
   * Fourth of July party with too much drinking and messy confessions.
   * Fights, misunderstandings, and jealousy between the brothers and Belly.
  1. End‑of‑summer turning point
    • By the end of the season/story, Belly has broken up with Cam and emotionally bounced between Jeremiah and Conrad.
 * The love triangle hits a major emotional peak: Conrad and Jeremiah are both clearly in love with her, and the brothers’ relationship is strained.

 * Belly and Conrad finally move toward admitting their feelings (in the TV version, she ends the season having had “dalliances” with both brothers and then choosing Conrad in a romantic, cliffhanger‑style way).

 * At the same time, the reality of Susannah’s illness means this “perfect” summer is also the last innocent one, so the ending is both romantic and bittersweet.

How people talk about it online (forums & thinkpieces)

  • Many viewers/readers see it as a nostalgic, slightly messy teen fantasy: a girl finally being seen, getting attention from two brothers, and figuring out her first real love.
  • Others criticize it as toxic or dated:
    • Heavy focus on looks and “becoming pretty” as the turning point of Belly’s worth.
    • A love triangle where the emotional back‑and‑forth can feel manipulative and unhealthy.
  • There are also ongoing discussions about representation (Asian American heroine, mostly white love interests, changes from the books in race/ethnicity of certain characters) and whether the show leans into or challenges those patterns.

Super short TL;DR

  • Belly spends one transformative summer at Cousins Beach.
  • She “turns pretty,” starts getting real romantic attention, and ends up in an intense triangle with brothers Conrad and Jeremiah.
  • Under the sun‑soaked romance, there’s serious family illness and adult drama, and by the end the summer changes all of their relationships for good.

Information gathered from public forums or data available on the internet and portrayed here.