When quiet postwoman Eve inherits the sprawling Archive of coastal town historian Emily Thornton, she doesn't just gain a job digitizing old documents - she steps into a labyrinth of family secrets, folklore, and forgotten love stories. Among sea-bleached letters and weather-worn journals, Eve discovers a photograph and a cryptic note: "Look beneath." As she follows the thread, she uncovers a truth that shifts everything she believed about her past - including her place in Ashcliffe's legacy. With the help of a cast of loyal, eccentric locals - and Geraint, a folklore researcher whose presence stirs something deep in her - Eve navigates tales of vanished folklorists, storm-born rituals, and the haunting myth of the Saltwater Siren. But the deeper she digs, the more she realizes: the Archive isn't just history. It's calling her to finish a story generations in the making. For fans of slow-burn romance, small-town mystery, and the quietly magical, Archiving the Undertow is a haunting, hopeful story about belonging, memory, and the power of women who refuse to be erased.