Neighbours Roman and Minnie Castavet soon come nosing around to welcome them; despite Rosemary's reservations about their eccentricity and the weird noises that she keeps hearing, her husband starts spending time with them. Shortly after Guy lands a plum Broadway role, Rosemary becomes pregnant, and the Castavets start taking a special interest in her welfare. As the sickened Rosemary becomes increasingly isolated, she begins to suspect that the Castavets' circle is not what it seems.