After her mother is murdered on Halloween, a rebellious teenager travels back in time to 1987 where she must stop the young would-be-killer and get back to her rightful time line before she's trapped in the past forever.

露丝·斯雷特（布洛克饰）因暴力犯罪被判入狱，出狱后的她重新踏入社会，但自己的过去却不被原谅。面对来自她曾经称之为“家”的地方的无情评判，她获得救赎的唯一希望，就是找到当初被自己无奈丢下而疏远了的妹妹。