Sydney is a normal high school student whose life changed when she met Billie Eilish.

Two people, once best friends, writing to each other from their current lives. That is because Charlie's mom suggests it to her daughter. Charlie lives in a 'perfect world' but that's just what it looks like, in reality she struggles accepting herself and she thinks that she only has flaws. Skye, on the other hand, is happy with herself but her life is far from perfect, her parents don't seem to want her, abusing her almost every day. Will their friendship blossom again? Will writing letters to each other change their lives for the better... or for the worse?