Desperate to finally construct the perfect family after years of heartbreaking fertility struggles, a wealthy couple hires a sweet, seemingly innocent young woman to act as their surrogate mother. They invite her to live in their gorgeous estate to ensure a stress-free pregnancy, treating her like royalty. However, the surrogate slowly begins displaying highly eccentric, possessive, and manipulative behaviors, systematically driving a wedge between the husband and wife. As the pregnancy approaches its final term, the couple uncovers a terrifying hidden identity in the surrogate's past, transforming their dream into a home-invasion nightmare.