Four childhood friends reunite as Chrissy prepares for the birth of her baby, prompting them to reflect on how the girls they once were became the women they are now. Looking back to the summer of 1970, Teeny, Chrissy, Samantha, and Roberta remember the bittersweet shift from childhood toward puberty, revisiting a season shaped by boys, secrets, bullies, and the bonds that tied them together.