The Au Pair follows a woman who seems to have it all—a successful husband, adorable stepchildren, a thriving business and a gorgeous home. When her diabetic father moves in next door and she begins to experience marital issues, however, she reluctantly agrees to hire an au pair. A beguiling young French woman takes the job and causes an unsettling shift in the household.

As instincts and suspicions arise, hidden agendas are hinted at and long-concealed truths are unveiled.