She doesn't sleep. She doesn't eat. And she is watching their family very, very closely.

It was supposed to be a normal, albeit tense, Christmas for the Jagger family. But the Pink Castle hides dark memories, and the siblings are about to unearth them all. Eldest daughter Julianna arrives to find her father has purchased a Jolvix companion bot-a chillingly perfect machine named January who wears her dead mother's clothes.

Then, the notes arrive: Your mother was murdered.

Twelve years ago, Janelle Jagger was found dead in her bathtub. Now, trapped in the Santa Barbara mansion with a brother prone to violent blackouts, an addicted sister, and a father desperate to bury the past, Julianna must figure out who is sending the notes and what really happened to her mother. But the Jaggers aren't the only ones keeping secrets.

January is watching. She is learning. And she is beginning to realize that the only way to survive this family is to destroy them first.