When Alice Beckingham answers an urgent summons to her sister's home in Yorkshire, she has no idea what dangers are in store for her. From the moment she crosses the threshold, she is enveloped in the same sinister shadows that seem to lie like a mist over the surrounding moorlands. Determined to discover who is behind an attempt on her sister's life, Alice soon finds herself doubting everyone around her, even her most reliable allies. Without her clever cousin Rose or the protective Sherborne Sharp on hand, can Alice put together the pieces of the haunting puzzle in time to save those dearest to her?