Rosemary Woodhouse, a young Catholic homemaker dreaming of starting a family, and Guy, her struggling actor husband, move into The Bramford, an imposing New York City building with a dark past. Surrounded by unsettling stories about mysterious residents and eerie occurrences, the new tenants befriend Roman and Minnie Castevet, their amiable next-door neighbors. Shortly after, Rosemary gets pregnant. At last, things are looking up. However, as alarming hints of a sinister conspiracy emerge, suspicion and mental agony get the best of her. Undoubtedly, the inexperienced mother-to-be is overreacting; no one wants to cut Rosemary off from her circle of friends. Then again, why is everyone so conveniently eager to help? And above all else, why is Guy allowing it?