Helen, a young woman who has recently married Jackson, moves to his family’s picturesque and sprawling farm after discovering she's pregnant. Despite the serene environment, Helen feels tension and unease due to Martha, Jackson's overbearing and controlling mother. Martha, still deeply attached to her son and the legacy of the family's estate, harbors hidden motives which slowly surface. She appears to offer Helen support and guidance, but her actions seem to have underlying intentions that Helen begins to suspect.

As time passes, Helen's discomfort grows, and she starts feeling more isolated on the farm. Without giving explicit reasons, Martha's behavior becomes more erratic and unsettling, leaving Helen to question her true intentions. The peaceful farm begins to feel ominous, and Helen realizes she must uncover Martha's real motives to protect herself and her unborn child. The escalating tension between Helen and Martha leads to a mounting sense of dread, culminating in a series of revelations that threaten to upend everything Helen believed about her new family.