But even with a clean slate, it's easy to see that Evie doesn't fit in on the Surface. And as her differences make her feel more and more alone, she can't help but yearn for that place she doesn't remember: the isolated city hidden in the depths of the ocean. Elysium. Home. But she can't exactly tell Gavin what she's feeling. Not when he's the one who helped her escape Elysium in the first place, and has the scars to prove it. Though the doctors say otherwise, Gavin believes that Evie just needs time. And if her memories don't come back, well, maybe she's better off not remembering her past. But the decision may be out of their hands when Evie's ever-elusive memories begin to collide with reality. People and images from her past appear in the most unlikely places, haunting her, provoking her...and making her seem not only strange but dangerous. Evie and Gavin can't wait around for her memories to return. They'll have to journey across the Outlands of the Surface to find help, and in the end, their search may just lead them back to the place it all started...