Since releasing her debut album her senior year of high school, Dylan Read has spent 15 years growing up in the public eye. In the circles of fame and celebrity in which she now travels, the careful maintenance of Dylan Read, the pop star, is often more important than the songs themselves. And so lots of people think they understand everything about her. But what no one knows is the part of her origin story she successfully has kept hidden: her childhood best friend, Kelsey, vanished the year before Dylan became famous. Now, as Dylan is at the height of her career, Kelsey’s body is found at the bottom of their hometown lake --- forcing Dylan to reckon with their shared past, her friend’s influence on her music, and if there’s more to their story than meets the eye.

ALL GIRLS follows nine young women as they navigate their ambitions and fears at a prestigious New England prep school, all pitched against the backdrop of a scandal the administration wants silenced. But as the months unfold, and the school's efforts to control the ensuing crisis fall short, these extraordinary girls are forced to discover their voices, and their power.