Interior designer Marnie Walker runs her business on a restored farm near the Grand Union Canal. She also owns some beautiful vacation homes and rents them out. But the idyllic bliss in rural Northamptonshire is disrupted by the arrival of mysterious lodger Samira Khan.

The enigmatic Asian beauty paid six months’ rent and locked herself in her canal-side retreat. Marnie tries to win Samira’s trust, but as a harrowing story unfolds, she gets more than she bargained for.