经过一个晚上的聚会，留下她的朋友，艾娃醒来，偷偷回到家才发现她已经在床上安全。但那不是因为它看起来像她。一个旅行的逃犯偷走了她的尸体、身份和生命。更重要的是她并不孤单。还有其他人，隐藏在过去，秘密地生活在我们中间，密谋改变未来。没有她的身体，她是一个虚拟的幽灵，沉默和看不见的世界。而且，据她所知，她是唯一一个能阻止他们，并把时间线回到课程。

  After a night out of partying and left behind by her friends, Ava wakes up and sneaks back home only to find that she's already safe in bed. But that's not Ava - it's someone who looks just like her. A time-traveling fugitive has stolen Ava's body, her identity, and her life. What's more -- she's not alone. There are others, hiding in the past, secretly living among us, plotting to alter the future. Without her body, Ava is a virtual ghost, silent and invisible to the world. And, so far as she knows, she's the only one who can stop them and put the timeline back on course.