印第安那州戈申镇上少女萨拉(安娜•肯德里克 Anna Kendrick 饰)和吉莉安(坦妮娅•雷蒙德 Tania Raymonde 饰)是一对形影不离的好友,但二人却大相径庭。乖孩子莎拉是明星学生、运动员,而日渐成熟丰满的吉莉安却叛逆放荡,甚至将自己的半裸照片放到网上,希望因此遇到一位好男人带她离开小镇。一次周末聚会后萨拉再未见过吉莉安,但镇上居民,包括吉莉安的母亲,都对她的失踪毫不在意,甚至欣喜。不久,萨拉收到一条吉莉安发来的模糊求救录像,在电脑俱乐部成员贾斯珀(查克•卡特 Chuck Carter 饰)的帮助下,萨拉进入吉莉安的网上帐户,试图找出可能对吉莉安行凶的凶手。但二人没想到,他们的调查竟挖掘出一个又一个戈申镇的黑暗秘密……Sarah and Jillian have been best friends for so long they can't remember when their friendship started. Growing up in the small town of Goshen, Indiana the two girls couldn't be more different. Sarah is a star pupil and athlete, a 100-watt-bulb in a five-watt-town, while Jillian is star mischief-maker, a 100lbs-of-trouble in a five-pound-bag. Although both girls long to be break free of the small-town life, Jillian is the first to act, revealing to Sarah that she has been meeting men on-line with the sole purpose of finding someone who will "take her away from this place". Soon thereafter, she disappears leaving Sarah with only a journal and a cryptic video message sent from her cell-phone. Sarah soon discovers that the town would rather forget that Jillian had ever existed. Distraught, she delves into the secrets surrounding her disappearance. Aided by, Jasper, the resident computer geek who secretly adores her, the two plunge head-long into Goshen's dark secrets -- uncovering corrupt police, jilted boyfriends, a mother driven mad by loss, and an unsolved string of child abductions. The final truth they unearth will rock the town to its foundations.