一架飞机,载着青春女孩麦肯兹(艾拉·珀内尔 Ella Purnell 饰)从西雅图来到了阿拉斯加。她的母亲因为个人问题,而将女孩送到了自己的弟弟家。这位陌生的舅舅(布莱恩·格拉格提 Brian Geraghty 饰)温和可亲,小心翼翼地打消麦肯兹的陌生感和怯懦之心,尽最大努力拉近彼此的距离,但在这一过程中他也越过了不该越过的底线。某次远足途中,压抑着无限情感的麦肯兹决定从舅舅手中逃离。她试图返回西雅图,一路辗转,途中邂逅了饱经风霜的背包客瑞恩•巴特利特(布鲁斯·格林伍德 Bruce Greenwood 饰)。 萍水相逢,忘年的孤独之旅,有些心情悄悄改变,有些人而注定离开……Mackenzie, a troubled but daring teenage girl, is sent by her struggling mother to live with her uncle in Juneau, Alaska. Although Uncle seems like a supportive caretaker and friend, the relationship turns and Mackenzie is forced to run. Trying to make her way back to Seattle alone to find her absent mother, Mackenzie only winds up deeper in the Alaskan interior. Lost and with no one else to turn to, she shadows a loner backpacker, Bartlett, an unlikely father figure with scars of his own. Together, they cross the wilderness and discover sanctuary in the last frontier.