Millie was just a boarding school student before a fateful fate turned her into a murderer with a ten-year criminal record after saving a friend from a rape. After her release from prison, she lived in her car and searched for a job that would provide her with a place to live. She was given a share of the wealthy Winchester family's home, and this job was her last chance to win a fresh start and hide her secret, before she discovered that the Winchesters' secrets were even more dangerous than her own.

Millie begins her new job after Nina Winchester calls her and asks her to work as a maid. Millie accepts the job in exchange for a lucrative salary she hadn't expected. At first, the days go by normally, as she picks up her daughter from school and prepares a delicious meal for the family. She even imagines herself living Nina's luxurious life with Andrew, before discovering what is in store for her.

The novel that caused a stir on Instagram, has been translated into 27 languages, and will soon be turned into a film.