Two girls were born into the house. Only one was allowed to leave.When Maren returns to her late mother's secluded mountain home to clear out thirty years of accumulated possessions, she expects grief, dust, and quiet closure. Instead, she finds subtle, disturbing anomalies. Rations are disappearing from the pantry. Fresh mud appears on clean floors. And inside the structural framing of the master closet, a hidden seam reveals a secret six-by-ten-foot room built directly into the central walls of the house.For thirty years, Maren lived a normal life out in the world, unaware that on the other side of her bedroom drywall, her twin sister, Anna, was being raised in total secrecy. Hidden from public records, medical files, and the outside world, Anna was meticulously raised by their mother to observe Maren's every move, learning her voice, her handwriting, her posture, and her deepest secrets through the plaster.Now, their mother is dead, the hidden room stands empty, and the boundary between their lives has finally collapsed. Trapped in a storm-isolated house engineered for deception, Maren finds herself locked in a chilling game of psychological survival against a sister who doesn't just want her freedom, she wants to step into Maren's skin and take her place in the world.A masterfully paced, atmospheric psychological thriller, The Twin In The Plaster, explores the terrifying claustrophobia of buried family secrets, shattered identity, and the haunting realization that the worst monsters are the ones that have been listening all along.