Duir Cottage in England conceals a portal through time, and across five books, five different couples — modern-day people and their nineteenth-century counterparts — are drawn together through it. The series begins with Emme Wilde, obsessed with the portrait of a man in an antique locket, who travels to 1812 only to find the real James Knight waiting. Each subsequent book follows a different couple connected to the same cottage and the same ripples of fate, exploring how the same place can touch different lives across time.

Each book's heroine is distinct: Emme is warm and dreamy, Georgiana is a mystery-solver, Kit is sharp-tongued and independent, Jasmine is unconventional and mathematical, and Fossi is a late-blooming genius with fierce tenacity. Readers consistently praised the author for giving each heroine her own voice and the heroes genuine depth and redemption arcs.

Each book stands largely alone while sharing a connected world and recurring characters, building an ensemble of beloved figures across both centuries. The series explores themes of fate, time, love across difference, and the question of whether people separated by centuries can truly belong to one another. The fifth book — Fossi and Lord Whitmoor — brings the cosmic-sea mythology of time to its conclusion as a broken portal threatens Time itself.