In a quaint, coastal town, lives Emily, a brilliant yet reclusive novelist in her late 30s. Emily suffers from a rare condition known as anterograde amnesia, which prevents her from creating new memories. Her life is stuck in a loop of déjà vu, reliving the same moments over and over. Despite her condition, Emily manages to write bestselling novels, thanks to her meticulous note-taking and the loyalty of her assistant, Sarah.