Morgane, a young 19-year-old student, arrives in Amsterdam with a French family to be the nanny of their two children. In search of independence and experience, she gives 200% of herself to this new job, despite her parents' fears for her fragile health, and the unsaid surrounding her charismatic employers. While a diffuse unease settles in the disturbing house they occupy, Morgane learns that the previous au pair has disappeared under strange circumstances ... Isolated in a foreign country whose language she does not speak, the trap closes on the young girl who will have to put the pieces of the puzzle together to save her skin.