In the second instalment of the "TATB" trilogy, Lara Jean and Peter Kavinsky are an official couple and starting the semester off on a fresh note. They've put the love letters (except Peter's, of course) and their messy, fake-dating mind games far behind them. That is until John Ambrose, one of the letter recipients and Lara's childhood crush, unexpectedly comes back into the picture. To make matters worse, Lara catches Peter talking and hanging out with his ex, and he doesn't offer up an explanation. Just when Lara's love life was coming up roses, she comes face-to-face with the growing pains of being in a new relationship.