Successful doctor, Raven Fields, finds herself drowning in work and looks to hire an assistant to help with her day-to-day. Taking a chance on a young and cheery woman, Raven believes she's found the perfect person until assistance turns into obsession, and she risks losing everything, including her life.

When a young woman infiltrates a family who may help her learn more about her estranged twin sister, she transforms from a nanny to a monster.