Lara Jean is a timid teen who has had crushes over the years. To say goodbye to these boys, she always wrote a letter put in an envelope with their address. By accident, all the boys have received them ; one is her sister's ex boyfriend, one is a jock and a few others.. She has to face all of them, including Peter who just got dumped and he's offering her a deal : they fake a relationship so he can win his ex back and stupidly Lara Jean accepts.