Jillian Marsh is a survivor. She escaped her toxic upbringing as a teenager and later got sober and built a successful marriage and medical career. Nearly a decade later, things are going downhill for Jillian. Her wife, Rochelle, has left her while Jillian is pregnant with Rochelle's biological child. Jillian feels constantly unsettled in her now-empty house, with items missing from their usual places, burning candles she can't remember lighting, and the screen from her bedroom window removed. Even her mommies-to-be group isn't the solace it once was. Bree, Camille, Maggie, and Jillian vowed not only to support one another in motherhood, but in their sobriety, careers, and maintaining their independence after their babies are born. The sisterhood begins to unravel when the secrets among the women gradually come to light. As things in Jillian's home begin to escalate, she's forced to ask herself whether one of her supposed friends not as trustworthy as she seems, if Rochelle could be gaslighting her in order to claim full custody of their daughter, or, worst of all, if Jillian is turning into her own toxic mother. When unambiguous threats are made, and as the circle of those she can trust continues to dwindle, Jillian knows only one thing for sure: she will do anything to protect her baby.