12歲的羅蘋就要進入青春期,偏偏她有個雖然愛她卻迷糊又不負責任的年輕媽媽。沒想到搬家轉校到新學校的第一天,初經意外報到染紅了白色牛仔褲,讓她在同學的面前出了大糗。人際關係和生理上的大麻煩,也讓母女兩人的關係面臨大挑戰。還沒準備好的羅蘋只想問,長大怎麼會這麼難?Bird, 12, has to become a woman whether she wants to or not when - in the worst week of her life - she gets her first period, is ditched by her impulsive, free spirited mom, and learns that you can never really go back to The Valley.