The Lisowski sisters fear their mom, but this Christmas is a nightmare.

Tammy Moore's loyalty to her mother is tested after police arrest Marie for murder. But a look back at the horrific events of her youth forces Tammy to see her mother in a new -- and terrifying -- light.

Vince Boston finds himself an unwitting accomplice to murder, and he realizes his father, Silas, has been killing for years; he embarks on a mission to get justice for his father's many victims, which may include Vince's mother.

When Terry Patzer hears what police discovered at Russell Tillis' house of horrors, memories of the nine years she spent married to him flood back; she can't explain how her former lover became so twisted, but she was right to be afraid.

Ginger knows her sister Paige is trouble, as she feels entitled to her family's undivided attention and becomes a monster when she doesn't get it; over time, Ginger watches as Paige abuses and ultimately murders the person she cares for the most.

Teresa Holman spends much of her childhood wishing her father, Freddie Bowen, would die for the things he does to his family, but when presented with a chance to get her wish, the choice she makes has unforeseen consequences and leads to tragedy.

Sara Pitcher thinks Shawn Spink is a man of God, but she'll soon endure three-and-a-half hours of pure terror to save herself from the darkness within him; police believe Sara's survival is a miracle -- even so, her life will never be the same.