When Landon receives a letter from Rose --- the woman he once planned forever with --- he learns that their love story is over. She has undergone a radical memory-erasing treatment, leaving behind her grief, her past...and him. But Landon can't bear to lose the love of his life. Now living in Edinburgh, Rose's world is a blank canvas, and she's dating someone new. When Landon reenters her life as a stranger, they become fast friends. But what Rose doesn’t know is that this new friend carries the weight of everything they once shared. And when she starts exhibiting strange symptoms, it becomes clear their history isn’t gone --- it’s just buried. And remembering could come at a devastating cost.