Nearly fully recovered from a car accident that caused a major concussion, Edie Black is hopeful about returning to her life as a freelance journalist and college teacher. A series of bizarre incidents and the persistent feeling that she's being followed make Edie question the reliability of her thoughts and instincts. Edie meets Skye Kenny, a brilliant and shy former soldier, and their immediate connection has Edie confessing her paranoid thoughts. Skye convinces Edie she is in real danger, and together the two women discover that information was embedded in Edie's brain during her concussion recovery and whoever put it there will do whatever it takes to get it back. On the run, Edie and Skye must uncover who is behind this plot while keeping Edie and her mind intact. Trusting Skye with her life, Edie can only hope she can also be trusted with her heart.