Dogtooth (2009)

In 'Dogtooth,' a controlling father keeps his three adult children prisoner in their family compound, depriving them of contact with the outside world. He manipulates and abuses them, enforcing strict rules and punishments for bad behavior. The children engage in bizarre rituals and believe false information about the world outside. However, as tensions rise and events unfold, one of the siblings decides to escape, leading to a dramatic climax.