After a night out and being dumped by her friends, Ava wakes up and sneaks back home only to find she's already safe in bed. But that's not Ava, that's someone who looks like her. A time-traveling fugitive from the future has gone back in time and stolen the teen's body, her identity, and her life. Besides, she's not alone. There are others, hiding in the past, living in secret among us, plotting to alter the future. Without her body, Ava is a virtual ghost, silent and invisible to the world. And, as far as she knows, she's the only one who can stop them and restore course to the timeline.