Provocative documentarian Erin Lee Carr (Thought Crimes: The Case of the Cannibal Cop) returns to HBO to explore another twisted true-crime story in the age of social media. Things are not always as they appear, especially in the case of Dee Dee and Gypsy Rose Blanchard, and what starts out as a grisly tale of matricide morphs into a rabbit hole of deception and abuse. As we learn, Dee Dee and her wheelchair-bound daughter, Gypsy Rose, were beloved residents of Springfield, MO, but the tight-knit community was rocked when Dee Dee was found murdered in her home, with Gypsy reported missing. After investigators tracked a graphic Facebook status post stating "That Bitch is Dead" to Wisconsin, a disturbing sequence of events ensued in which Gypsy Rose was implicated in her mother's murder and it was discovered that Gypsy Rose had been the victim of her mother's abuse via Munchausen by proxy syndrome since early childhood. Featuring exclusive interviews with Gypsy Rose, Mommy Dead and Dearest unravels a tangled web of lies, child abuse, mental illness and forbidden love. It's a real-life mystery about a mother and daughter who everybody thought were living a fairy-tale life, but who turned out to be sharing a living nightmare.