Lucrèce, the best killer in the business, accepts a final job: eliminate an opera singer who threatens the interests of a corporation. She's hired as a contralto for a festival her target is singing in, but things don't happen as planned.
Filming lasted 9 weeks.
When in her bedroom, Lucrèce is heard tapping numerous keys on her macbook laptop, followed by the idiosyncratic noise of the macbook starting up. This noise is only produced when a macbook is powering up, which requires pushing only the 'on' button, which doesn't make a sound.